StaticPrefList.yaml - mozsearch firefox-main modules libpref init StaticPrefList.yaml Enable keyboard shortcuts Revision control Go to latest version Git log Mercurial log Raw Blame Copy as Markdown # This Source Code Form is subject to the terms of the Mozilla Public # License, v. 2.0. If a copy of the MPL was not distributed with this # file, You can obtain one at . */ # This file defines static prefs, i.e. those that are defined at startup and # used entirely or mostly from C++ and/or Rust code. # The file is separated into sections, where each section contains a group of # prefs that all share the same first segment of their name -- all the "gfx.*" # prefs are together, all the "network.*" prefs are together, etc. Sections # must be kept in alphabetical order, but prefs within sections need not be. # Basics # ------ # Any pref defined in one of the files included here should *not* be defined # in a data file such as all.js; that would just be useless duplication. # (Except under unusual circumstances where the value defined here must be # overridden, e.g. for some Thunderbird prefs. In those cases the default # value from the data file will override the static default value defined # here.) # Please follow the existing prefs naming convention when considering adding a # new pref, and don't create a new pref group unless it's appropriate and there # are likely to be multiple prefs within that group. (If you do, you'll need to # update the `pref_groups` variable in modules/libpref/moz.build.) # Definitions # ----------- # A pref definition looks like this: # - name: # mandatory # type: # mandatory # value: # mandatory # mirror: # mandatory # do_not_use_directly: # optional # include: # optional # rust: # optional # set_spidermonkey_pref: # optional # - `name` is the name of the pref, without double-quotes, as it appears # in about:config. It is used in most libpref API functions (from both C++ # and JS code). # - `type` is one of `bool`, `int32_t`, `uint32_t`, `float`, an atomic version # of one of those, `String` or `DataMutexString`. Note that float prefs are # stored internally as strings. The C++ preprocessor doesn't like template # syntax in a macro argument, so use the typedefs defined in # StaticPrefsBase.h; for example, use `RelaxedAtomicBool` instead of # `Atomic`. # - `value` is the default value. Its type should be appropriate for # , otherwise the generated code will fail to compile. A complex # C++ numeric expressions like `60 * 60` (which the YAML parser cannot treat # as an integer or float) is treated as a string and passed through without # change, which is useful. # - `mirror` indicates how the pref value is mirrored into a C++ variable. # * `never`: There is no C++ mirror variable. The pref value can only be # accessed via the standard libpref API functions. # * `once`: The pref value is mirrored into a variable at startup; the # mirror variable is left unchanged after that. (The exact point at which # all `once` mirror variables are set is when the first `once` mirror # variable is accessed, via its getter function.) This is mostly useful for # graphics prefs where we often don't want a new pref value to apply until # restart. Otherwise, this update policy is best avoided because its # behaviour can cause confusion and bugs. # * `always`: The mirror variable is always kept in sync with the pref value. # This is the most common choice. # When a mirror variable is present, a getter will be created that can access # it. Using the getter function to read the pref's value has the two # following advantages over the normal API functions. # * A direct variable access is faster than a hash table lookup. # * A mirror variable can be accessed off the main thread. If a pref *is* # accessed off the main thread, it should have an atomic type. Assertions # enforce this. # Note that Rust code must access the mirror variable directly, rather than # via the getter function. # - `do_not_use_directly` indicates if `_DoNotUseDirectly` should be appended to # the name of the getter function. This is simply a naming convention # indicating that there is some other wrapper getter function that should be # used in preference to the normal static pref getter. Defaults to `false` if # not present. Cannot be used with a `never` mirror value, because there is # no getter function in that case. # - `include` names a header file that must be included for the pref value to # compile correctly, e.g. because it refers to a code constant. System # headers should be surrounded with angle brackets, e.g. ``. # - `rust` indicates if the mirror variable is used by Rust code. If so, it # will be usable via the `static_prefs::pref!` macro, e.g. # `static_prefs::pref!("layout.css.cross-fade.enabled")`. # - `set_spidermonkey_pref` indicates whether SpiderMonkey boilerplate code # should be generated for this pref. If this is set to 'startup', the # pref on the SpiderMonkey side is only set during process startup. If set to # 'always', the SpiderMonkey pref value is also updated when this pref is # changed at runtime. # This option is only valid for javascript.options.* prefs. # The getter function's base name is the same as the pref's name, but with # '.' or '-' chars converted to '_', to make a valid identifier. For example, # the getter for `foo.bar_baz` is `foo_bar_baz()`. This is ugly but clear, # and you can search for both the pref name and the getter using the regexp # /foo.bar.baz/. Suffixes are added as follows: # - If the `mirror` value is `once`, `_AtStartup` is appended, to indicate the # value was obtained at startup. # - If the `do_not_use_directly` value is true, `_DoNotUseDirectly` is # appended. # Preprocessor # ------------ # Note finally that this file is preprocessed by preprocessor.py, not the C++ # preprocessor. As a result, the following things may be surprising. # - YAML comments start with a '#', so putting a comment on the same line as a # preprocessor directive is dubious. E.g. avoid lines like `#define X 3 # # three` because the ` # three` will be part of `X`. # - '@' use is required for substitutions to occur. E.g. with `#define FOO 1`, # `FOO` won't be replaced with `1` unless it has '@' chars around it. # - Spaces aren't permitted between the leading '#' and the name of a # directive, e.g. `#ifdef XYZ` works but `# ifdef XYZ` does not. # Please indent all prefs defined within #ifdef/#ifndef conditions. This # improves readability, particular for conditional blocks that exceed a single # screen. But note that the leading '-' in a definition must remain in the # first column for it to be valid YAML. #ifdef RELEASE_OR_BETA #define IS_NOT_RELEASE_OR_BETA false #else #define IS_NOT_RELEASE_OR_BETA true #endif #ifdef NIGHTLY_BUILD #define IS_NIGHTLY_BUILD true #define IS_NOT_NIGHTLY_BUILD false #else #define IS_NIGHTLY_BUILD false #define IS_NOT_NIGHTLY_BUILD true #endif #if defined(NIGHTLY_BUILD) || defined(MOZ_DEV_EDITION) #define IS_NIGHTLY_OR_DEV_EDITION true #else #define IS_NIGHTLY_OR_DEV_EDITION false #endif #ifdef MOZILLA_OFFICIAL #define IS_NOT_MOZILLA_OFFICIAL false #else #define IS_NOT_MOZILLA_OFFICIAL true #endif #ifdef EARLY_BETA_OR_EARLIER #define IS_EARLY_BETA_OR_EARLIER true #define IS_NOT_EARLY_BETA_OR_EARLIER false #else #define IS_EARLY_BETA_OR_EARLIER false #define IS_NOT_EARLY_BETA_OR_EARLIER true #endif #if defined(MOZ_DEV_EDITION) || defined(EARLY_BETA_OR_EARLIER) #define IS_DEV_EDITION_OR_EARLY_BETA_OR_EARLIER true #else #define IS_DEV_EDITION_OR_EARLY_BETA_OR_EARLIER false #endif #ifdef ANDROID #define IS_ANDROID true #define IS_NOT_ANDROID false #else #define IS_ANDROID false #define IS_NOT_ANDROID true #endif #ifdef XP_WIN #define IS_XP_WIN true #define IS_NOT_XP_WIN false #else #define IS_XP_WIN false #define IS_NOT_XP_WIN true #endif #ifdef XP_MACOSX #define IS_XP_MACOSX true #define IS_NOT_XP_MACOSX false #else #define IS_XP_MACOSX false #define IS_NOT_XP_MACOSX true #endif #--------------------------------------------------------------------------- # Prefs starting with "accessibility." #--------------------------------------------------------------------------- # Tab focus model bit field: # 1 focuses text controls, 2 focuses other form elements, 4 adds links. # Most users will want 1, 3, or 7. On macOS we expose a checkbox to alter # between 7 and 3. - name: accessibility.tabfocus type: int32_t value: 7 mirror: always # Only on mac tabfocus is expected to handle UI widgets as well as web content. # FIXME(emilio): This is weird now that we have a lot of HTML in our pages. - name: accessibility.tabfocus_applies_to_xul type: bool value: @IS_XP_MACOSX@ mirror: always - name: accessibility.accesskeycausesactivation type: bool value: true mirror: always - name: accessibility.monoaudio.enable type: RelaxedAtomicBool value: false mirror: always - name: accessibility.browsewithcaret type: RelaxedAtomicBool value: false mirror: always - name: accessibility.AOM.enabled type: bool value: false mirror: always - name: accessibility.ARIAElementReflection.enabled type: bool value: @IS_NIGHTLY_BUILD@ mirror: always # Whether to enable all accessibility cache domains on startup. # * false: enable domains as needed # * true: enable all domains regardless of need (cache everything) - name: accessibility.enable_all_cache_domains type: bool value: false mirror: once # Whether form controls and images should be focusable with mouse, in content # documents. # This matches historical macOS / Safari behavior. # * 0: never # * 1: always # * 2: on content documents - name: accessibility.mouse_focuses_formcontrol type: int32_t #ifdef XP_MACOSX value: 2 #else value: 1 #endif mirror: always # Whether to enable support for the UI Automation API on Windows. - name: accessibility.uia.enable type: bool value: false mirror: always # Whether to avoid accessibility activation on Windows shortly after clipboard # copy. # Possible values are: # * 0: never # * 1: always # * 2 (or others): when needed - name: accessibility.windows.suppress-after-clipboard-copy type: uint32_t value: 2 mirror: always # Whether to avoid accessibility activation on Windows shortly after max button # hit-test for the "snap layout" feature. # Possible values are: # * 0: never # * 1: always # * 2 (or others): when needed - name: accessibility.windows.suppress-for-snap-layout type: uint32_t value: 2 mirror: always #--------------------------------------------------------------------------- # Prefs starting with "alerts." #--------------------------------------------------------------------------- # Whether to use platform-specific backends for showing desktop notifications. # If no such backend is available, or if the pref is false, then XUL # notifications are used. - name: alerts.useSystemBackend type: bool value: true mirror: always #if defined(XP_WIN) # On Windows, a COM Surrogate notification server receives notification events # and can relaunch the application after it has been closed. - name: alerts.useSystemBackend.windows.notificationserver.enabled type: bool value: true mirror: never #endif #ifdef ANDROID #--------------------------------------------------------------------------- # Prefs starting with "android." #--------------------------------------------------------------------------- # On Android, we want an opaque background to be visible under the page, # so layout should not force a default background. - name: android.widget_paints_background type: RelaxedAtomicBool value: true mirror: always - name: android.touch_resampling.enabled type: RelaxedAtomicBool value: false mirror: always #endif #--------------------------------------------------------------------------- # Prefs starting with "apz." # The apz prefs are explained in AsyncPanZoomController.cpp #--------------------------------------------------------------------------- # amount we zoom in for a double tap gesture if we couldn't find any content # based rect to zoom to - name: apz.doubletapzoom.defaultzoomin type: AtomicFloat value: 1.2f mirror: always - name: apz.scrollbarbuttonrepeat.enabled type: RelaxedAtomicBool value: true mirror: always # After a user has executed a pan gesture, we may receive momentum phase pan # gestures from the OS. This specifies how long we should wait following the # pan end gesture for possible momentum phase pan gestures before sending the # TransformEnd notification. - name: apz.scrollend-event.content.delay_ms type: RelaxedAtomicInt32 value: 100 mirror: always - name: apz.wr.activate_all_scroll_frames type: RelaxedAtomicBool value: false mirror: always - name: apz.wr.activate_all_scroll_frames_when_fission type: RelaxedAtomicBool value: true mirror: always - name: apz.prefer_jank_minimal_displayports type: RelaxedAtomicBool value: true mirror: always - name: apz.allow_double_tap_zooming type: RelaxedAtomicBool value: true mirror: always - name: apz.mac.enable_double_tap_zoom_touchpad_gesture type: RelaxedAtomicBool value: true mirror: always - name: apz.allow_immediate_handoff type: RelaxedAtomicBool value: false mirror: always - name: apz.allow_zooming type: RelaxedAtomicBool value: true mirror: always - name: apz.max_zoom type: AtomicFloat value: 10.0f mirror: always - name: apz.min_zoom type: AtomicFloat value: 0.25f mirror: always - name: apz.allow_zooming_out type: RelaxedAtomicBool value: false mirror: always - name: apz.android.chrome_fling_physics.friction type: AtomicFloat value: 0.015f mirror: always - name: apz.android.chrome_fling_physics.inflexion type: AtomicFloat value: 0.35f mirror: always - name: apz.android.chrome_fling_physics.stop_threshold type: AtomicFloat value: 0.1f mirror: always - name: apz.autoscroll.enabled type: RelaxedAtomicBool value: true mirror: always - name: apz.axis_lock.breakout_angle type: AtomicFloat value: float(M_PI / 8.0) # 22.5 degrees mirror: always include: - name: apz.axis_lock.breakout_threshold type: AtomicFloat value: 1.0f / 32.0f mirror: always - name: apz.axis_lock.direct_pan_angle type: AtomicFloat value: float(M_PI / 3.0) # 60 degrees mirror: always include: - name: apz.axis_lock.lock_angle type: AtomicFloat value: float(M_PI / 6.0) # 30 degrees mirror: always include: # Whether to lock touch scrolling to one axis at a time. When a new # axis lock mode is added, the APZCAxisLockCompatTester GTest shoud # be updated to include the lock mode value. # 0 = FREE (No locking at all) # 1 = STANDARD (Once locked, remain locked until scrolling ends) # 2 = STICKY (Allow lock to be broken, with hysteresis) # 3 = DOMINANT_AXIS (Only allow movement on one axis at a time, only # applies to touchpad scrolling) - name: apz.axis_lock.mode type: RelaxedAtomicInt32 #if defined(XP_MACOSX) value: 3 #else value: 2 #endif mirror: always - name: apz.content_response_timeout type: RelaxedAtomicInt32 value: 400 mirror: always - name: apz.danger_zone_x type: RelaxedAtomicInt32 value: 50 mirror: always - name: apz.danger_zone_y type: RelaxedAtomicInt32 value: 100 mirror: always - name: apz.disable_for_scroll_linked_effects type: RelaxedAtomicBool value: false mirror: always - name: apz.displayport_expiry_ms type: RelaxedAtomicUint32 value: 15000 mirror: always - name: apz.drag.enabled type: RelaxedAtomicBool value: true mirror: always - name: apz.drag.touch.enabled type: RelaxedAtomicBool value: true mirror: always - name: apz.enlarge_displayport_when_clipped type: RelaxedAtomicBool value: @IS_ANDROID@ mirror: always # Test only. - name: apz.fixed-margin-override.enabled type: RelaxedAtomicBool value: false mirror: always # Test only. - name: apz.fixed-margin-override.bottom type: RelaxedAtomicInt32 value: 0 mirror: always # Test only. - name: apz.fixed-margin-override.top type: RelaxedAtomicInt32 value: 0 mirror: always - name: apz.fling_accel_base_mult type: AtomicFloat value: 1.0f mirror: always - name: apz.fling_accel_supplemental_mult type: AtomicFloat value: 1.0f mirror: always - name: apz.fling_accel_min_fling_velocity type: AtomicFloat value: 1.5f mirror: always - name: apz.fling_accel_min_pan_velocity type: AtomicFloat value: 0.8f mirror: always - name: apz.fling_accel_max_pause_interval_ms type: RelaxedAtomicInt32 value: 50 mirror: always - name: apz.fling_curve_function_x1 type: float value: 0.0f mirror: once - name: apz.fling_curve_function_x2 type: float value: 1.0f mirror: once - name: apz.fling_curve_function_y1 type: float value: 0.0f mirror: once - name: apz.fling_curve_function_y2 type: float value: 1.0f mirror: once - name: apz.fling_curve_threshold_inches_per_ms type: AtomicFloat value: -1.0f mirror: always - name: apz.fling_friction type: AtomicFloat value: 0.002f mirror: always - name: apz.fling_min_velocity_threshold type: AtomicFloat value: 0.5f mirror: always - name: apz.fling_stop_on_tap_threshold type: AtomicFloat value: 0.05f mirror: always - name: apz.fling_stopped_threshold type: AtomicFloat value: 0.01f mirror: always - name: apz.touch_acceleration_factor_x type: float value: 1.0f mirror: always - name: apz.touch_acceleration_factor_y type: float value: 1.0f mirror: always #ifdef MOZ_WIDGET_GTK - name: apz.gtk.kinetic_scroll.enabled type: RelaxedAtomicBool value: true mirror: always - name: apz.gtk.pangesture.enabled type: RelaxedAtomicBool value: true mirror: always # Mode to use when receiving pan gesture input. # * 0: Auto mode (uses the default behavior, subject to change). # * 1: Page mode: Uses gtk deltas as a percentage of the page size to scroll. This mode matches: # * 2: Pixel mode: Uses gtk deltas as a fixed pixel multiplier. This mode matches e.g. GNOME web. # (multiplied then by pixelsPerLineStep which in GNOME-web is 40). - name: apz.gtk.pangesture.delta_mode type: uint32_t value: 0 mirror: always - name: apz.gtk.pangesture.page_delta_mode_multiplier type: float value: 1.0f mirror: always - name: apz.gtk.pangesture.pixel_delta_mode_multiplier type: float value: 40.0f mirror: always - name: apz.gtk.touchpad_pinch.enabled type: RelaxedAtomicBool value: true mirror: always - name: apz.gtk.touchpad_pinch.three_fingers.enabled type: RelaxedAtomicBool value: false mirror: always #endif - name: apz.keyboard.enabled type: bool value: @IS_NOT_ANDROID@ mirror: once - name: apz.keyboard.passive-listeners type: RelaxedAtomicBool value: @IS_NOT_ANDROID@ mirror: always - name: apz.max_tap_time type: RelaxedAtomicInt32 value: 300 mirror: always - name: apz.max_velocity_inches_per_ms type: AtomicFloat value: -1.0f mirror: always - name: apz.max_velocity_queue_size type: uint32_t value: 5 mirror: once - name: apz.min_skate_speed type: AtomicFloat value: 1.0f mirror: always - name: apz.minimap.enabled type: RelaxedAtomicBool value: false mirror: always - name: apz.one_touch_pinch.enabled type: RelaxedAtomicBool value: @IS_ANDROID@ mirror: always - name: apz.overscroll.enabled type: RelaxedAtomicBool value: true mirror: always # The "test async scroll offset" (used via reftest-async-scroll # or nsIDOMWindowUtils.setAsyncScrollOffset()) can be used to # trigger overscroll. Used for tests only. - name: apz.overscroll.test_async_scroll_offset.enabled type: RelaxedAtomicBool value: false mirror: always - name: apz.overscroll.min_pan_distance_ratio type: AtomicFloat value: 1.0f mirror: always - name: apz.overscroll.stop_distance_threshold type: AtomicFloat value: 5.0f mirror: always - name: apz.overscroll.spring_stiffness type: AtomicFloat value: 200 mirror: always - name: apz.overscroll.damping type: AtomicFloat value: 1.1 mirror: always - name: apz.overscroll.max_velocity type: AtomicFloat value: 10 mirror: always - name: apz.paint_skipping.enabled type: RelaxedAtomicBool value: true mirror: always # Fetch displayport updates early from the message queue. - name: apz.pinch_lock.mode type: RelaxedAtomicInt32 value: 2 mirror: always - name: apz.pinch_lock.scroll_lock_threshold type: AtomicFloat value: 1.0f / 16.0f # 1/16 inches mirror: always - name: apz.pinch_lock.span_breakout_threshold type: AtomicFloat value: 1.0f / 32.0f # 1/32 inches mirror: always - name: apz.pinch_lock.span_lock_threshold type: AtomicFloat value: 1.0f / 32.0f # 1/32 inches mirror: always - name: apz.pinch_lock.buffer_max_age type: int32_t value: 80 # milliseconds mirror: once - name: apz.popups.enabled type: RelaxedAtomicBool value: true mirror: always # Whether to print the APZC tree for debugging. - name: apz.printtree type: RelaxedAtomicBool value: false mirror: always - name: apz.record_checkerboarding type: RelaxedAtomicBool value: @IS_NIGHTLY_BUILD@ mirror: always - name: apz.second_tap_tolerance type: AtomicFloat value: 0.5f mirror: always # If this is true, APZ fully recalculates the scroll thumb size and # position in the compositor. This leads to the size and position # being more accurate in scenarios such as async zooming. - name: apz.scrollthumb.recalc type: RelaxedAtomicBool value: true mirror: always - name: apz.test.fails_with_native_injection type: RelaxedAtomicBool value: false mirror: always - name: apz.test.logging_enabled type: RelaxedAtomicBool value: false mirror: always - name: apz.touch_move_tolerance type: AtomicFloat value: 0.1f mirror: always - name: apz.touch_start_tolerance type: AtomicFloat value: 0.1f mirror: always - name: apz.velocity_bias type: AtomicFloat value: 0.0f mirror: always - name: apz.velocity_relevance_time_ms type: RelaxedAtomicUint32 value: 100 mirror: always - name: apz.windows.force_disable_direct_manipulation type: RelaxedAtomicBool value: false mirror: always - name: apz.windows.use_direct_manipulation type: RelaxedAtomicBool value: true mirror: always - name: apz.windows.check_for_pan_gesture_conversion type: RelaxedAtomicBool value: true mirror: always - name: apz.x_skate_highmem_adjust type: AtomicFloat value: 0.0f mirror: always - name: apz.x_skate_size_multiplier type: AtomicFloat value: 1.25f mirror: always - name: apz.x_stationary_size_multiplier type: AtomicFloat value: 1.5f mirror: always - name: apz.y_skate_highmem_adjust type: AtomicFloat value: 0.0f mirror: always - name: apz.y_skate_size_multiplier type: AtomicFloat #if defined(MOZ_WIDGET_ANDROID) value: 1.5f #else value: 3.5f #endif mirror: always - name: apz.y_stationary_size_multiplier type: AtomicFloat #if defined(MOZ_WIDGET_ANDROID) value: 1.5f #else value: 3.5f #endif mirror: always - name: apz.zoom_animation_duration_ms type: RelaxedAtomicInt32 #if defined(MOZ_WIDGET_ANDROID) value: 250 #else value: 350 #endif mirror: always - name: apz.scale_repaint_delay_ms type: RelaxedAtomicInt32 value: 500 mirror: always # Whether to use rounded external scroll offsets. - name: apz.rounded_external_scroll_offset type: bool value: false mirror: always #--------------------------------------------------------------------------- # Prefs starting with "beacon." #--------------------------------------------------------------------------- # Is support for Navigator.sendBeacon enabled? - name: beacon.enabled type: bool value: true mirror: always #--------------------------------------------------------------------------- # Prefs starting with "bidi." #--------------------------------------------------------------------------- # Whether delete and backspace should immediately delete characters not # visually adjacent to the caret, or adjust the visual position of the caret # on the first keypress and delete the character on a second keypress - name: bidi.edit.delete_immediately type: bool value: true mirror: always # Bidi caret movement style: # 0 = logical # 1 = visual # 2 = visual, but logical during selection - name: bidi.edit.caret_movement_style type: int32_t #if !defined(XP_LINUX) && defined(NIGHTLY_BUILD) value: 1 #else value: 2 # See Bug 1638240 #endif mirror: always # Bidi numeral style: # 0 = nominalnumeralBidi * # 1 = regularcontextnumeralBidi # 2 = hindicontextnumeralBidi # 3 = arabicnumeralBidi # 4 = hindinumeralBidi # 5 = persiancontextnumeralBidi # 6 = persiannumeralBidi - name: bidi.numeral type: RelaxedAtomicUint32 value: 0 mirror: always # Bidi text type # 1 = charsettexttypeBidi * # 2 = logicaltexttypeBidi # 3 = visualtexttypeBidi - name: bidi.texttype type: RelaxedAtomicUint32 value: 1 mirror: always # Bidi direction # 1 = directionLTRBidi * # 2 = directionRTLBidi - name: bidi.direction type: RelaxedAtomicUint32 value: 1 mirror: always # Setting this pref to |true| forces Bidi UI menu items and keyboard shortcuts # to be exposed, and enables the directional caret hook. By default, only # expose it for bidi-associated system locales. - name: bidi.browser.ui type: bool value: false mirror: always #--------------------------------------------------------------------------- # Prefs starting with "browser." #--------------------------------------------------------------------------- - name: browser.active_color type: String value: "#EE0000" mirror: never - name: browser.active_color.dark type: String value: "#FF6666" mirror: never - name: browser.anchor_color type: String value: "#0000EE" mirror: never # If you change this, you probably also want to change # nsXPLookAndFeel::GenericDarkColor for MozNativehyperlinktext. - name: browser.anchor_color.dark type: String value: "#8C8CFF" mirror: never # See - name: browser.autofocus type: bool value: true mirror: always - name: browser.cache.disk.enable type: RelaxedAtomicBool value: true mirror: always - name: browser.cache.memory.enable type: RelaxedAtomicBool value: true mirror: always # Limit of recent metadata we keep in memory for faster access, in KB. - name: browser.cache.disk.metadata_memory_limit type: RelaxedAtomicUint32 value: 250 # 0.25 MB mirror: always # Does the user want smart-sizing? - name: browser.cache.disk.smart_size.enabled type: RelaxedAtomicBool value: true mirror: always # Disk cache capacity in kilobytes. It's used only when # browser.cache.disk.smart_size.enabled == false - name: browser.cache.disk.capacity type: RelaxedAtomicUint32 value: 256000 mirror: always # -1 = determine dynamically, 0 = none, n = memory capacity in kilobytes. - name: browser.cache.memory.capacity type: RelaxedAtomicInt32 value: -1 mirror: always # When smartsizing is disabled we could potentially fill all disk space by # cache data when the disk capacity is not set correctly. To avoid that we # check the free space every time we write some data to the cache. The free # space is checked against two limits. Once the soft limit is reached we start # evicting the least useful entries, when we reach the hard limit writing to # the entry fails. - name: browser.cache.disk.free_space_soft_limit type: RelaxedAtomicUint32 value: 5 * 1024 # 5MB mirror: always - name: browser.cache.disk.free_space_hard_limit type: RelaxedAtomicUint32 value: 1024 # 1MB mirror: always # The number of chunks we preload ahead of read. One chunk currently has # 256kB. - name: browser.cache.disk.preload_chunk_count type: RelaxedAtomicUint32 value: 4 # 1 MB of read ahead mirror: always # Max-size (in KB) for entries in disk cache. Set to -1 for no limit. # (Note: entries bigger than 1/8 of disk-cache are never cached) - name: browser.cache.disk.max_entry_size type: RelaxedAtomicUint32 value: 50 * 1024 # 50 MB mirror: always # Max-size (in KB) for entries in memory cache. Set to -1 for no limit. # (Note: entries bigger than than 90% of the mem-cache are never cached.) - name: browser.cache.memory.max_entry_size type: RelaxedAtomicInt32 value: 5 * 1024 mirror: always # Memory limit (in kB) for new cache data not yet written to disk. Writes to # the cache are buffered and written to disk on background with low priority. # With a slow persistent storage these buffers may grow when data is coming # fast from the network. When the amount of unwritten data is exceeded, new # writes will simply fail. We have two buckets, one for important data # (priority) like html, css, fonts and js, and one for other data like images, # video, etc. # Note: 0 means no limit. - name: browser.cache.disk.max_chunks_memory_usage type: RelaxedAtomicUint32 value: 40 * 1024 mirror: always - name: browser.cache.disk.max_priority_chunks_memory_usage type: RelaxedAtomicUint32 value: 40 * 1024 mirror: always # Number of seconds the cache spends writing pending data and closing files # after shutdown has been signalled. Past that time data is not written and # files are left open for the OS to clean up. - name: browser.cache.max_shutdown_io_lag type: RelaxedAtomicUint32 value: 2 mirror: always # After the max_shutdown_io_lag has passed, we will attempt to cancel # blocking IO (on windows). The CacheIOThread may pick up more blocking # tasks so we want to cancel those too. The main thread will be woken # up every shutdown_io_time_between_cancellations_ms to cancel the IO # on the other thread. - name: browser.cache.shutdown_io_time_between_cancellations_ms type: RelaxedAtomicUint32 value: 5 mirror: always # A percentage limit for media content type in the disk cache. When some entries # need to be evicted and media is over the limit, it's evicted first. - name: browser.cache.disk.content_type_media_limit type: RelaxedAtomicInt32 value: 50 mirror: always # How often to validate document in cache # 0 = once-per-session, # 1 = each-time, # 2 = never, # 3 = when-appropriate/automatically - name: browser.cache.check_doc_frequency type: RelaxedAtomicUint32 value: 3 mirror: always # Compression level for cached JavaScript bytecode # 0 = do not compress, # 1 = minimal compression, # 9 = maximal compression - name: browser.cache.jsbc_compression_level type: RelaxedAtomicUint32 value: 0 mirror: always # Whether tooltips are enabled. - name: browser.chrome.toolbar_tips type: bool value: true mirror: always # Whether tooltips are hidden on keydown. # 0: never # 1: always # 2: only on non-modifier keys - name: browser.chrome.toolbar_tips.hide_on_keydown type: uint32_t #if defined(XP_WIN) value: 0 #else value: 2 #endif mirror: always # DLP agent name, for display in the browser - name: browser.contentanalysis.agent_name type: String value: "A DLP agent" mirror: never # (optional) The organization name that the DLP agent should have. If this is # non-empty and the DLP agent is not signed with this organization name, # Firefox will fail the connection. - name: browser.contentanalysis.client_signature type: String value: "" mirror: never # Content analysis by external applications, e.g. data-loss prevention apps - name: browser.contentanalysis.enabled type: bool value: false mirror: always # What content analysis should return if there is a problem communicating # with the agent. (see DefaultResponse enum in ContentAnalysis.h) # Make sure these stay in sync with the out-of-range check in Policies.sys.mjs. # 0: Block all requests # 1: Warn on all requests (which lets the user decide) # 2: Allow all requests - name: browser.contentanalysis.default_result type: uint32_t value: 0 mirror: always # Is the IPC pipe to the DLP tool specific to the user or to the system? - name: browser.contentanalysis.is_per_user type: bool value: true mirror: always # Path name of pipe used to connect to a configured DLP agent. - name: browser.contentanalysis.pipe_path_name type: String value: "path_user" mirror: never # Space-separated list of regexs that are compared to URLs of resources # being checked by content-analysis. Resources that match are not checked # and are always permitted. # By default this does not check any about: page except for about:blank # and about:srcdoc. - name: browser.contentanalysis.allow_url_regex_list type: String value: "^about:(?!blank|srcdoc).*" mirror: never # Space-separated list of regexs that are compared to URLs of resources # being checked by content-analysis. Resources that match are not checked # and are always denied. - name: browser.contentanalysis.deny_url_regex_list type: String value: "" mirror: never # Should CA ignore the system setting and use silent notifications? - name: browser.contentanalysis.silent_notifications type: bool value: false mirror: always # Time (secs) after which content analysis operations are considered timed-out - name: browser.contentanalysis.agent_timeout type: uint32_t value: 30 mirror: always # Should Firefox show a notification or dialog when content analysis blocks # access? - name: browser.contentanalysis.show_blocked_result type: bool value: true mirror: always # Should Firefox bypass content analysis for pastes and drags whose source # is the same tab? - name: browser.contentanalysis.bypass_for_same_tab_operations type: bool value: false mirror: always # Content blocking for Enhanced Tracking Protection - name: browser.contentblocking.database.enabled type: bool value: false mirror: always # How many recent block/unblock actions per origins we remember in the # Content Blocking log for each top-level window. - name: browser.contentblocking.originlog.length type: uint32_t value: 32 mirror: always # Min font device pixel size at which to turn on high quality. - name: browser.display.auto_quality_min_font_size type: RelaxedAtomicUint32 value: 20 mirror: always - name: browser.display.background_color type: String value: "#FFFFFF" mirror: never - name: browser.display.background_color.dark type: String value: "#1C1B22" mirror: never # This preference is a bit confusing because we use the opposite # string value in the colors dialog to indicate to users how FF HCM # will behave. # With resect to document colors, these values mean: # 0 = "default" = always, except in high contrast mode # 1 = "always" # 2 = "never" # On windows, we set this to 0, which means FF HCM will mirror OS HCM. # Everywhere else, we set this to 1, disabling FF HCM. - name: browser.display.document_color_use type: RelaxedAtomicUint32 #if defined(XP_WIN) value: 0 #else value: 1 #endif mirror: always rust: true # 0 = always native # 1 = never native # other = default - name: browser.display.windows.non_native_menus type: RelaxedAtomicUint32 value: 2 mirror: always rust: true # This pref dictates whether or not backplates and background images # are to be drawn, when in high-contrast mode: # false: do not draw backplates or render background images # true: render background images and draw backplates # This condition is only considered when high-contrast mode is enabled # in Firefox, ie. when the user has: # (1) mUseAccessibilityMode set to true (Widows high-contrast mode is on) # AND browser.display.document_color_use set to 0 # (only with high-contrast themes) OR # (2) browser.display.document_color_use set to 2 (always) - name: browser.display.permit_backplate type: RelaxedAtomicBool value: true mirror: always rust: true # Whether we should suppress the background-image of the canvas (the root # frame) if we're in forced colors mode. # This is important because some sites use background-image with a plain color # and it causes undesirable results in high-contrast mode. # See bug 1614921 for example. - name: browser.display.suppress_canvas_background_image_on_forced_colors type: bool value: true mirror: always - name: browser.display.foreground_color type: String value: "#000000" mirror: never - name: browser.display.foreground_color.dark type: String value: "#FBFBFE" mirror: never # Determines the behavior of OS zoom settings. # 0: doesn't affect rendering at all # 1: affects full zoom (dpi, effectively). # 2: affects text zoom. # Default is (1): Historical behavior on Linux, matches other browsers on # Windows, and generally creates more consistent rendering. - name: browser.display.os-zoom-behavior type: RelaxedAtomicInt32 value: 1 mirror: always rust: true # Whether focus rings are always shown by default. # This is the initial value of nsWindowRoot::mShowFocusRings, but it can be # overridden by system preferences. - name: browser.display.show_focus_rings type: bool value: false mirror: always # Enable showing image placeholders while image is loading or when image is broken. - name: browser.display.show_image_placeholders type: bool value: true mirror: always # Whether we should always enable focus rings after focus was moved by keyboard. # This behavior matches both historical and GTK / Windows focus behavior. # :focus-visible is intended to provide better heuristics than this. - name: browser.display.always_show_rings_after_key_focus type: bool value: false mirror: always # In theory: 0 = never, 1 = quick, 2 = always, though we always just use it as # a bool! - name: browser.display.use_document_fonts type: RelaxedAtomicInt32 value: 1 mirror: always rust: true # font-family names for which we'll override use_document_fonts=0, and always # use the specified font. # This is to support ligature-icon fonts, which render literal strings like # "arrow_drop_down" with an icon, even when use_document_fonts is disabled. # If an author provides & uses such a font, and we decline to use it, we'll end # up rendering these literal strings where the author intended an icon, which # can cause all sorts of overlapping/unreadable content. - name: browser.display.use_document_fonts.icon_font_allowlist type: String value: >- Material Icons, Material Icons Extended, Material Icons Outlined, Material Icons Round, Material Icons Sharp, Material Icons Two Tone, Google Material Icons, Google Material Icons Filled, Material Symbols Outlined, Material Symbols Round, Material Symbols Rounded, Material Symbols Sharp, Google Symbols, FontAwesome mirror: never - name: browser.display.use_system_colors type: RelaxedAtomicBool #ifdef XP_WIN value: true #else value: false #endif mirror: always - name: browser.dom.window.dump.enabled type: RelaxedAtomicBool value: @IS_NOT_MOZILLA_OFFICIAL@ mirror: always # See bug 1738574 - name: browser.download.start_downloads_in_tmp_dir type: bool value: false mirror: always # See bug 1747343 - name: browser.download.always_ask_before_handling_new_types type: bool value: false mirror: always # See bug 1731668 - name: browser.download.enable_spam_prevention type: bool value: false mirror: always # See bug 1772569 - name: browser.download.open_pdf_attachments_inline type: bool value: false mirror: always # See bug 1811830 - name: browser.download.force_save_internally_handled_attachments type: bool value: false mirror: always - name: browser.download.sanitize_non_media_extensions type: bool value: true mirror: always # Image document's automatic image sizing. - name: browser.enable_automatic_image_resizing type: bool value: true mirror: always # Image document's click-to-resize. - name: browser.enable_click_image_resizing type: bool value: @IS_NOT_ANDROID@ mirror: always - name: browser.find.ignore_ruby_annotations type: bool value: true mirror: always #if defined(XP_MACOSX) # Whether pressing Esc will exit fullscreen. - name: browser.fullscreen.exit_on_escape type: bool value: true mirror: always #endif # The max url length we'll store in history. # The default value is mostly a guess based on various facts: # * IE didn't support urls longer than 2083 chars # * Sitemaps protocol used to support a maximum of 2048 chars # * Various SEO guides suggest to not go over 2000 chars # * Various apps/services are known to have issues over 2000 chars # * RFC 2616 - HTTP/1.1 suggests being cautious about depending # on URI lengths above 255 bytes - name: browser.history.maxUrlLength type: uint32_t value: 2000 mirror: always # Max size of push/replaceState data parameter - name: browser.history.maxStateObjectSize type: int32_t value: 16777216 mirror: always # True to collect wireframes upon navigations / pushState - name: browser.history.collectWireframes type: bool value: false mirror: always # The minimum area for a rect to be included in a wireframe, in CSS pixels. # The current value of 50 is pretty arbitrary, and will be tuned as we refine # and test the wireframing capability. - name: browser.history.wireframeAreaThreshold type: uint32_t value: 50 mirror: always #if defined(XP_WIN) || defined(XP_LINUX) # Notify TabUnloader or send the memory pressure if the memory resource # notification is signaled AND the available commit space is lower than # this value. - name: browser.low_commit_space_threshold_mb type: RelaxedAtomicUint32 value: 200 mirror: always #endif #ifdef XP_LINUX # On Linux we also check available memory in comparison to total memory, # and use this percent value (out of 100) to determine if we are in a # low memory scenario. - name: browser.low_commit_space_threshold_percent type: RelaxedAtomicUint32 value: 5 mirror: always #endif # Render animations and videos as a solid color - name: browser.measurement.render_anims_and_video_solid type: RelaxedAtomicBool value: false mirror: always - name: browser.navigation.requireUserInteraction type: bool value: @IS_NIGHTLY_BUILD@ mirror: always # Indicates if about:newtab shows content (enabled) or just blank. - name: browser.newtabpage.enabled type: bool value: true mirror: always # Open PDFs in Edge with the --app flag if it is the default. - name: browser.pdf.launchDefaultEdgeAsApp type: bool value: true mirror: always # Maximium delay between keystrokes that will be considered typing (milliseconds). - name: browser.places.interactions.typing_timeout_ms type: RelaxedAtomicUint32 value: 3000 mirror: always # Maximum delay between scroll input events that will be considered a scrolling interaction (milliseconds). - name: browser.places.interactions.scrolling_timeout_ms type: RelaxedAtomicUint32 value: 5000 mirror: always # Number of seconds till the sponsored session is timeout. - name: browser.places.sponsoredSession.timeoutSecs type: RelaxedAtomicUint32 value: 3600 mirror: always # Whether to start the private browsing mode at application startup - name: browser.privatebrowsing.autostart type: bool value: false mirror: always # Force usage of in-memory (rather than file on disk) media cache for video streaming when private browsing - name: browser.privatebrowsing.forceMediaMemoryCache type: bool value: false mirror: always # Communicates the toolbar color to platform (for e.g., prefers-color-scheme). # Returns whether the toolbar is dark (0), light (1), or system (2). The # theming code overrides it if appropriate. - name: browser.theme.toolbar-theme type: RelaxedAtomicUint32 value: 2 mirror: always # Communicates the preferred content theme color to platform (for e.g., # prefers-color-scheme). # dark (0), light (1), system (2), or toolbar (3). # Default to "toolbar", the theming code sets it appropriately. - name: browser.theme.content-theme type: RelaxedAtomicUint32 value: 2 mirror: always rust: true # Whether the firefox titlebar respects the # -moz-windows-accent-color-in-titlebar setting on the tab strip. - name: browser.theme.windows.accent-color-in-tabs.enabled type: RelaxedAtomicBool value: false mirror: always rust: true # Blocked plugin content - name: browser.safebrowsing.blockedURIs.enabled type: bool value: true mirror: always # Malware protection - name: browser.safebrowsing.malware.enabled type: bool value: true mirror: always # Phishing protection - name: browser.safebrowsing.phishing.enabled type: bool value: true mirror: always # Maximum size for an array to store the safebrowsing prefixset. - name: browser.safebrowsing.prefixset_max_array_size type: RelaxedAtomicUint32 value: 512*1024 mirror: always # SessionStore prefs # Maximum number of bytes of DOMSessionStorage data we collect per origin. - name: browser.sessionstore.dom_storage_limit type: uint32_t value: 2048 mirror: always # Maximum number of characters of form field data per field we collect. - name: browser.sessionstore.dom_form_limit type: uint32_t value: 1024*1024*2 mirror: always # Maximum number of characters of form data we collect per origin. - name: browser.sessionstore.dom_form_max_limit type: uint32_t value: 1024*1024*50 mirror: always # Minimal interval between two save operations in milliseconds (while the user is active). - name: browser.sessionstore.interval type: RelaxedAtomicUint32 value: 15000 mirror: always # Disable collection of data for session store using the native collector code, # instead use the older implementation that's not compatible with session # history in the parent (and thus Fission). - name: browser.sessionstore.disable_platform_collection type: bool #if defined(MOZ_THUNDERBIRD) value: true #else value: false #endif mirror: once do_not_use_directly: true #if defined(NIGHTLY_BUILD) || defined(MOZ_DEV_EDITION) || defined(DEBUG) - name: browser.startup.record type: bool value: false mirror: always #endif # Causes SessionStore to ignore non-final update messages from # browser tabs that were not caused by a flush from the parent. # This is a testing flag and should not be used by end-users. - name: browser.sessionstore.debug.no_auto_updates type: RelaxedAtomicBool value: false mirror: always # If set, when a link is opened to a new tab, do not switch to the new tab. # This pref is used when the link is opened with "Open Link in New Tab", # middle-click, etc. # See also browser.tabs.loadDivertedInBackground, which is used when the website # diverts the link into a new tab. - name: browser.tabs.loadInBackground type: bool value: true mirror: always # Whether we should draw the tabs on top of the titlebar. # no (0), yes (1), or default (2), which is true everywhere except Linux. - name: browser.tabs.inTitlebar type: int32_t value: 2 mirror: always # If set, use DocumentChannel to directly initiate loads entirely # from parent-process BrowsingContexts - name: browser.tabs.documentchannel.parent-controlled type: bool value: false mirror: always # If set, middle clicking on a link opens the link in a new tab. - name: browser.tabs.opentabfor.middleclick type: bool value: true mirror: always # Testing-only pref which makes data: URIs be loaded in a "web" content process # instead of within a process based on the URI's loader. - name: browser.tabs.remote.dataUriInDefaultWebProcess type: bool value: false mirror: always # Testing-only pref to force system-triggered about:blank loads to not change # content processes. This is used for performance tests which load an # about:blank document between navigations for historical reasons to avoid # unnecessary process switches. - name: browser.tabs.remote.systemTriggeredAboutBlankAnywhere type: bool value: false mirror: always # Testing-only pref to cause PBrowser creation for a specific BrowsingContext to # fail, to test the errored codepath. - name: browser.tabs.remote.testOnly.failPBrowserCreation.enabled type: bool value: false mirror: always - name: browser.tabs.remote.force-paint type: bool value: true mirror: always # When this pref is enabled document loads with a mismatched # Cross-Origin-Embedder-Policy header will fail to load - name: browser.tabs.remote.useCrossOriginEmbedderPolicy type: RelaxedAtomicBool value: true mirror: always # This pref makes `credentialless` a valid value for # Cross-Origin-Embedder-Policy header - name: browser.tabs.remote.coep.credentialless type: RelaxedAtomicBool #if defined(ANDROID) value: @IS_NIGHTLY_BUILD@ #else value: true #endif mirror: always do_not_use_directly: true # When this pref is enabled top level loads with a mismatched # Cross-Origin-Opener-Policy header will be loaded in a separate process. - name: browser.tabs.remote.useCrossOriginOpenerPolicy type: RelaxedAtomicBool value: true mirror: always # When this pref is enabled then we use a separate content process for # top-level load of file:// URIs - name: browser.tabs.remote.separateFileUriProcess type: RelaxedAtomicBool #if !defined(ANDROID) value: true #else value: false #endif mirror: always # Pref to control whether we use a separate privileged content process # for certain mozilla webpages (which are listed in the pref # browser.tabs.remote.separatedMozillaDomains). - name: browser.tabs.remote.separatePrivilegedMozillaWebContentProcess type: bool value: false mirror: always # Whether or not process selection for subframes will prefer re-using an # existing content process over creating a new one. Enabling this pref should # reduce the number of processes allocated for non-first-party domains if # dom.ipc.processCount.webIsolated > 1. - name: browser.tabs.remote.subframesPreferUsed type: bool value: true mirror: always # When this pref is enabled, opaque response is only allowed to enter the # content process if it's a response for media (audio, image, video), CSS, or # JavaScript. - name: browser.opaqueResponseBlocking type: RelaxedAtomicBool #if defined(ANDROID) value: false #else value: true #endif mirror: always # When this pref is enabled, the JS validator will be enabled for # ORB. - name: browser.opaqueResponseBlocking.javascriptValidator type: bool value: true mirror: always # This pref controls how filtering of opaque responses for calls to `Window.fetch`. # (and similar) is performed in the parent process. This is intended to make sure # that data that would be filtered in a content process never actually reaches that # content process. # See # 0) Don't filter in the parent process at all, and let content processes handle # opaque filtering. Regardless of if ORB is enabled or not. N.B. that if ORB # is enabled opaque responses will be blocked. # 1) If ORB is enabled, in the parent process, filter the responses that ORB allows. # N.B. any responses ORB doesn't allow will not send data to a content process # since they will return a NetworkError. If the request is allowed by ORB, the # internal response will be intact and sent to the content process as is. # 2) If ORB is enabled, in the parent process, filter the responses that ORB blocks, # when they were issued by `Window.fetch` (and similar). # 3) Filter all responses in the parent, regardless of if ORB is enabled or not. # This means that opaque responses coming from `Window.fetch` won't even be # considered for being blocked by ORB. - name: browser.opaqueResponseBlocking.filterFetchResponse type: uint32_t value: 2 mirror: always do_not_use_directly: true # This pref controls how exceptions to opaque response blocking for the media MIME types # `audio/*` and `video/*` are handled. This is because step 8 in the spec that performs # audio or video type pattern matching cannot handle certain MIME types (yet). # See # 0) No exceptions # 1) Some exceptions, explicitly hard coded in `IsOpaqueSafeListedSpecBreakingMIMEType` # 2) Allow all MIME types beginning with `audio/*` or `video/*`. - name: browser.opaqueResponseBlocking.mediaExceptionsStrategy type: uint32_t value: 1 mirror: always do_not_use_directly: true # When true, zooming will be enabled on all sites, even ones that declare # user-scalable=no or use touch-action to disable pinch gestures. - name: browser.ui.zoom.force-user-scalable type: RelaxedAtomicBool value: false mirror: always - name: browser.viewport.desktopWidth type: RelaxedAtomicInt32 value: 980 mirror: always - name: browser.visited_color type: String value: "#551A8B" mirror: never # If you change this, you probably also want to change # nsXPLookAndFeel::GenericDarkColor for MozNativevisitedhyperlinktext. - name: browser.visited_color.dark type: String value: "#FFADFF" mirror: never # When true, soft reloads (including location.reload()) # will only froce validate the top level document, subresources will # be loaded normally as-if users normally navigated to the page. - name: browser.soft_reload.only_force_validate_top_level_document type: bool value: true mirror: always # Whether or not to save and restore zoom levels on a per-site basis. - name: browser.zoom.siteSpecific type: bool value: @IS_NOT_ANDROID@ mirror: always #--------------------------------------------------------------------------- # Prefs starting with "channelclassifier." #--------------------------------------------------------------------------- - name: channelclassifier.allowlist_example type: bool value: false mirror: always #--------------------------------------------------------------------------- # Prefs starting with "clipboard." #--------------------------------------------------------------------------- # Clipboard behavior. - name: clipboard.autocopy type: bool #if !defined(ANDROID) && !defined(XP_MACOSX) && defined(XP_UNIX) value: true #else value: false #endif mirror: always #ifdef XP_WIN # allow to copy clipboard data to Clipboard History/Cloud # (used on sensitive data in about:logins and Private Browsing) - name: clipboard.copyPrivateDataToClipboardCloudOrHistory type: bool value: false mirror: always # Whether to put a file promise onto the clipboard when copying images on Windows - name: clipboard.imageAsFile.enabled type: bool value: @IS_NOT_EARLY_BETA_OR_EARLIER@ mirror: always #endif #--------------------------------------------------------------------------- # Prefs starting with "consoleservice." #--------------------------------------------------------------------------- #if defined(ANDROID) # Disable sending console to logcat on release builds. - name: consoleservice.logcat type: RelaxedAtomicBool value: @IS_NOT_RELEASE_OR_BETA@ mirror: always #endif #--------------------------------------------------------------------------- # Prefs starting with "content." #--------------------------------------------------------------------------- - name: content.cors.disable type: bool value: false mirror: always # Back off timer notification after count. # -1 means never. - name: content.notify.backoffcount type: int32_t value: -1 mirror: always # Notification interval in microseconds. # The notification interval has a dramatic effect on how long it takes to # initially display content for slow connections. The current value # provides good incremental display of content without causing an increase # in page load time. If this value is set below 1/10 of a second it starts # to impact page load performance. # See bugzilla bug 72138 for more info. - name: content.notify.interval type: int32_t value: 120000 mirror: always # Do we notify based on time? - name: content.notify.ontimer type: bool value: true mirror: always # How many times to deflect in interactive mode. - name: content.sink.interactive_deflect_count type: int32_t value: 0 mirror: always # How many times to deflect in perf mode. - name: content.sink.perf_deflect_count type: int32_t value: 200 mirror: always # Parse mode for handling pending events. # 0 = don't check for pending events # 1 = don't deflect if there are pending events # 2 = bail if there are pending events - name: content.sink.pending_event_mode type: int32_t #ifdef XP_WIN value: 1 #else value: 0 #endif mirror: always # How often to probe for pending events. 1 = every token. - name: content.sink.event_probe_rate type: int32_t value: 1 mirror: always # How long to stay off the event loop in interactive mode (microseconds). - name: content.sink.interactive_parse_time type: int32_t value: 3000 mirror: always # How long to stay off the event loop in perf mode. - name: content.sink.perf_parse_time type: int32_t value: 30000 mirror: always # How long to be in interactive mode after an event. - name: content.sink.interactive_time type: uint32_t value: 750000 mirror: always # How long to stay in perf mode after initial loading. - name: content.sink.initial_perf_time type: uint32_t value: 2000000 mirror: always # Should we switch between perf-mode and interactive-mode? # 0 = Switch # 1 = Interactive mode # 2 = Perf mode - name: content.sink.enable_perf_mode type: int32_t value: 0 mirror: always #--------------------------------------------------------------------------- # Prefs starting with "converter." #--------------------------------------------------------------------------- # Whether we include ruby annotation in the text despite whether it # is requested. This was true because we didn't explicitly strip out # annotations. Set false by default to provide a better behavior, but # we want to be able to pref-off it if user doesn't like it. - name: converter.html2txt.always_include_ruby type: bool value: false mirror: always #--------------------------------------------------------------------------- # Prefs starting with "cookiebanners." #--------------------------------------------------------------------------- # Controls the cookie banner handling mode in normal browsing. # 0: Disables all cookie banner handling. # 1: Reject-all if possible, otherwise do nothing. # 2: Reject-all if possible, otherwise accept-all. - name: cookiebanners.service.mode type: uint32_t value: 0 mirror: always # When set to true, cookie banners are detected and detection events are # dispatched, but they will not be handled. Requires the service to be enabled # for the desired mode via pref cookiebanners.service.mode* - name: cookiebanners.service.detectOnly type: bool value: false mirror: always # Controls the cookie banner handling mode in private browsing. Same mode # options as the normal browsing pref above. - name: cookiebanners.service.mode.privateBrowsing type: uint32_t value: 0 mirror: always # Enables use of global CookieBannerRules, which apply to all sites. This is # used for click rules that can handle common Consent Management Providers # (CMP). # Enabling this (when the cookie handling feature is enabled) may negatively # impact site performance since it requires us to run rule-defined query # selectors for every page. - name: cookiebanners.service.enableGlobalRules type: bool value: true mirror: always # Whether global rules are allowed to run in sub-frames. Running query selectors # in every sub-frame may negatively impact performance, but is required for some # CMPs. - name: cookiebanners.service.enableGlobalRules.subFrames type: bool value: true mirror: always # Enables the cookie banner cookie injector. The cookie banner cookie injector # depends on the `cookiebanners.service.mode` pref above. - name: cookiebanners.cookieInjector.enabled type: bool value: true mirror: always # By default, how many seconds in the future cookies should expire after they # have been injected. Defaults to 12 months. Individual cookie rules may # override this. - name: cookiebanners.cookieInjector.defaultExpiryRelative type: uint32_t value: 31536000 mirror: always # How many times per site and site load to check for cookie banners after which # the mechanism is considered on cooldown for the site in the current browsing # session. If the threshold is set to zero, banner clicking won't be considered # as being on cooldown regardless of how many times the site is loaded. The # maximum value for the retry is 255, any value over than that will be capped. - name: cookiebanners.bannerClicking.maxTriesPerSiteAndSession type: uint32_t value: 3 mirror: always #--------------------------------------------------------------------------- # Prefs starting with "datareporting." #--------------------------------------------------------------------------- - name: datareporting.healthreport.uploadEnabled type: RelaxedAtomicBool value: false mirror: always rust: true #--------------------------------------------------------------------------- # Prefs starting with "device." #--------------------------------------------------------------------------- # Is support for the device sensors API enabled? - name: device.sensors.enabled type: bool value: true mirror: always # KaiOS-only, see - name: device.sensors.ambientLight.enabled type: bool value: false mirror: always - name: device.sensors.motion.enabled type: bool value: true mirror: always - name: device.sensors.orientation.enabled type: bool value: true mirror: always # KaiOS-only, see - name: device.sensors.proximity.enabled type: bool value: false mirror: always - name: device.sensors.test.events type: bool value: false mirror: always #--------------------------------------------------------------------------- # Prefs starting with "devtools." #--------------------------------------------------------------------------- - name: devtools.console.stdout.chrome type: RelaxedAtomicBool value: @IS_NOT_MOZILLA_OFFICIAL@ mirror: always - name: devtools.console.stdout.content type: RelaxedAtomicBool value: false mirror: always #--------------------------------------------------------------------------- # Prefs starting with "docshell." #--------------------------------------------------------------------------- # Used to indicate whether session history listeners should be notified # about content viewer eviction. Used only for testing. - name: docshell.shistory.testing.bfevict type: bool value: false mirror: always # If true, pages with an opener won't be bfcached. - name: docshell.shistory.bfcache.require_no_opener type: bool value: @IS_ANDROID@ mirror: always # If true, page with beforeunload or unload event listeners can be bfcached. - name: docshell.shistory.bfcache.allow_unload_listeners type: bool value: @IS_ANDROID@ mirror: always # If true, page with beforeunload event listeners can be bfcached. # This only works when sessionHistoryInParent is enabled. - name: docshell.shistory.bfcache.ship_allow_beforeunload_listeners type: bool value: true mirror: always #--------------------------------------------------------------------------- # Prefs starting with "dom." #--------------------------------------------------------------------------- # Allow cut/copy - name: dom.allow_cut_copy type: bool value: true mirror: always # Checks if offscreen animation throttling is enabled. - name: dom.animations.offscreen-throttling type: bool value: true mirror: always # Is support for Navigator.getBattery enabled? - name: dom.battery.enabled type: bool value: true mirror: always # Block multiple external protocol URLs in iframes per single event. - name: dom.block_external_protocol_in_iframes type: bool value: true mirror: always # Block sandboxed BrowsingContexts from navigating to external protocols. - name: dom.block_external_protocol_navigation_from_sandbox type: bool value: true mirror: always # Block Insecure downloads from Secure Origins - name: dom.block_download_insecure type: bool value: true mirror: always # Block multiple window.open() per single event. - name: dom.block_multiple_popups type: bool value: true mirror: always # The maximum number of popup that is allowed to be opened. Set to -1 for no # limit. - name: dom.popup_maximum type: int32_t value: -1 mirror: always # Enable experimental popup blocker changes. - name: dom.popup.experimental type: bool value: @IS_NIGHTLY_BUILD@ mirror: always # Enable CacheAPI in private browsing mode with encryption - name: dom.cache.privateBrowsing.enabled type: RelaxedAtomicBool value: true mirror: always # Exposes window.caches and skips SecureContext check. # dom.serviceWorkers.testing.enabled also includes the same effect. - name: dom.caches.testing.enabled type: RelaxedAtomicBool value: false mirror: always # A pref that is used to slow down database initialization for testing purposes. - name: dom.cache.databaseInitialization.pauseOnIOThreadMs type: RelaxedAtomicUint32 value: 0 mirror: always # Disable capture attribute for input elements; only supported on GeckoView. - name: dom.capture.enabled type: bool value: false mirror: always # HTML specification says the level should be 5 - name: dom.clamp.timeout.nesting.level type: uint32_t value: 5 mirror: once # Skip the security checks for document.cookie. - name: dom.cookie.testing.enabled type: RelaxedAtomicBool value: false mirror: always - name: dom.closewatcher.enabled type: bool value: false mirror: always # Disable custom highlight API; implementation pending. - name: dom.customHighlightAPI.enabled type: RelaxedAtomicBool value: @IS_NIGHTLY_BUILD@ mirror: always rust: true # Allow control characters appear in composition string. # When this is false, control characters except # CHARACTER TABULATION (horizontal tab) are removed from # both composition string and data attribute of compositionupdate # and compositionend events. - name: dom.compositionevent.allow_control_characters type: bool value: false mirror: always # Compression Streams (CompressionStream/DecompressionStream) - name: dom.compression_streams.enabled type: RelaxedAtomicBool value: true mirror: always # Disable cookie-store API - name: dom.cookieStore.enabled type: RelaxedAtomicBool value: @IS_NIGHTLY_BUILD@ mirror: always # Is support for CSSPseudoElement enabled? - name: dom.css_pseudo_element.enabled type: bool value: false mirror: always # After how many seconds we allow external protocol URLs in iframe when not in # single events - name: dom.delay.block_external_protocol_in_iframes type: uint32_t value: 10 # in seconds mirror: always # Whether the above pref has any effect at all. # Make sure cases like bug 1795380 work before trying to turn this off. See bug 1680721 for some other context that might be relevant. - name: dom.delay.block_external_protocol_in_iframes.enabled type: bool value: true mirror: always - name: dom.details_group.enabled type: bool value: true mirror: always # Only propagate the open window click permission if the setTimeout() is equal # to or less than this value. - name: dom.disable_open_click_delay type: int32_t value: 1000 mirror: always - name: dom.disable_open_during_load type: bool value: false mirror: always - name: dom.disable_beforeunload type: bool value: false mirror: always - name: dom.require_user_interaction_for_beforeunload type: bool value: true mirror: always # Enable/disable Gecko specific edit commands - name: dom.document.edit_command.contentReadOnly.enabled type: bool value: @IS_NOT_EARLY_BETA_OR_EARLIER@ mirror: always - name: dom.document.edit_command.insertBrOnReturn.enabled type: bool value: @IS_NOT_EARLY_BETA_OR_EARLIER@ mirror: always # Only intended for fuzzing purposes, this will break mozPrintCallback, etc. - name: dom.window_print.fuzzing.block_while_printing type: bool value: false mirror: always # Enable/disable contenteditable="plaintext-only". - name: dom.element.contenteditable.plaintext-only.enabled type: bool value: @IS_NIGHTLY_BUILD@ mirror: always # Whether Dialog elements emit beforetoggle and toggle events during opening and closing. # See - name: dom.element.dialog.toggle_events.enabled type: bool value: true mirror: always - name: dom.element.transform-getters.enabled type: bool value: false mirror: always # Whether the popover attribute implementation is enabled, # see - name: dom.element.popover.enabled type: RelaxedAtomicBool value: true mirror: always rust: true # Whether the blocking attribute implementation is enabled, # see - name: dom.element.blocking.enabled type: RelaxedAtomicBool value: false mirror: always # Whether CustomStateSet is enabled - name: dom.element.customstateset.enabled type: RelaxedAtomicBool value: true mirror: always rust: true # Whether the invoketarget attribute implementation is enabled - name: dom.element.invokers.enabled type: bool value: false mirror: always - name: dom.mouse_capture.enabled type: bool value: true mirror: always # Is support for Performance.mozMemory enabled? - name: dom.enable_memory_stats type: bool value: false mirror: always # Enable Performance API # Whether nonzero values can be returned from performance.timing.* - name: dom.enable_performance type: RelaxedAtomicBool value: true mirror: always # Enable Performance Observer API - name: dom.enable_performance_observer type: RelaxedAtomicBool value: true mirror: always # Whether resource timing will be gathered and returned by performance.GetEntries* - name: dom.enable_resource_timing type: bool value: true mirror: always # Whether event timing will be gathered and returned by performance observer* - name: dom.enable_event_timing type: RelaxedAtomicBool value: true mirror: always # Whether the LargestContentfulPaint API will be gathered and returned by performance observer* - name: dom.enable_largest_contentful_paint type: RelaxedAtomicBool value: true mirror: always # Whether performance.GetEntries* will contain an entry for the active document - name: dom.enable_performance_navigation_timing type: bool value: true mirror: always # Whether the scheduler interface will be exposed - name: dom.enable_web_task_scheduling type: RelaxedAtomicBool value: @IS_NIGHTLY_BUILD@ mirror: always # If this is true, it's allowed to fire "cut", "copy" and "paste" events. # Additionally, "input" events may expose clipboard content when inputType # is "insertFromPaste" or something. - name: dom.event.clipboardevents.enabled type: bool value: true mirror: always # Whether Shift+Right click force-opens the context menu - name: dom.event.contextmenu.shift_suppresses_event type: bool value: true mirror: always - name: dom.event.dragexit.enabled type: bool value: @IS_NOT_NIGHTLY_BUILD@ mirror: always # If this pref is set to true, typing a surrogate pair causes one `keypress` # event whose `charCode` stores the unicode code point over 0xFFFF. This is # compatible with Safari and Chrome in non-Windows platforms. # Otherwise, typing a surrogate pair causes two `keypress` events. This is # compatible with legacy web apps which does # `String.fromCharCode(event.charCode)`. - name: dom.event.keypress.dispatch_once_per_surrogate_pair type: bool value: false mirror: always # This is meaningful only when `dispatch_once_per_surrogate_pair` is false. # If this pref is set to true, `.key` of the first `keypress` is set to the # high-surrogate and `.key` of the other is set to the low-surrogate. # Therefore, setting this exposing ill-formed UTF-16 string with `.key`. # (And also `InputEvent.data` if pressed in an editable element.) # Otherwise, `.key` of the first `keypress` is set to the surrogate pair, and # `.key` of the second `keypress` is set to the empty string. - name: dom.event.keypress.key.allow_lone_surrogate type: bool value: @IS_NOT_EARLY_BETA_OR_EARLIER@ mirror: always # Whether wheel event target's should be grouped. When enabled, all wheel # events that occur in a given wheel transaction have the same event target. - name: dom.event.wheel-event-groups.enabled type: RelaxedAtomicBool value: true mirror: always # Whether WheelEvent should return pixels instead of lines for # WheelEvent.deltaX/Y/Z, when deltaMode hasn't been checked. # Other browsers don't use line deltas and websites forget to check for it, see bug 1392460 - name: dom.event.wheel-deltaMode-lines.disabled type: bool value: true mirror: always # Mostly for debugging. Whether we should do the same as # dom.event.wheel-deltaMode-lines.disabled, but unconditionally rather than # only when deltaMode hasn't been checked. - name: dom.event.wheel-deltaMode-lines.always-disabled type: bool value: false mirror: always # A blocklist (list of domains) for the # dom.event.wheel-deltaMode-lines.disabled behavior, in case potential # unforeseen problems with it arrive. - name: dom.event.wheel-deltaMode-lines.always-enabled type: String value: "" mirror: never #if defined(XP_MACOSX) # Whether to disable treating ctrl click as right click - name: dom.event.treat_ctrl_click_as_right_click.disabled type: bool value: @IS_NIGHTLY_BUILD@ mirror: always #endif # Whether Gecko keeps store or forgets the last deepest "enter" event target for # the next "enter" or "leave" event dispatching when the last "over" event # target is removed from the DOM tree. - name: dom.events.mouse-pointer-boundary.keep-enter-targets-after-over-target-removed type: bool value: @IS_EARLY_BETA_OR_EARLIER@ mirror: always # Whether .offset{X,Y} for events targeted at SVG nodes returns bounds relative # to the outer SVG. - name: dom.events.offset-in-svg-relative-to-svg-root type: bool value: true mirror: always # Control whether clipboard.read(), clipboard.write() and ClipboardItem are exposed # to content. - name: dom.events.asyncClipboard.clipboardItem type: bool value: true mirror: always # Skips checking permission and user activation when accessing the clipboard. # Should only be enabled in tests. # Access with Clipboard::IsTestingPrefEnabled(). - name: dom.events.testing.asyncClipboard type: bool value: false mirror: always do_not_use_directly: true # Control whether `navigator.clipboard.readText()` is exposed to content. - name: dom.events.asyncClipboard.readText type: bool value: true mirror: always do_not_use_directly: true # This pref controls whether or not the `protected` dataTransfer state is # enabled. If the `protected` dataTransfer stae is disabled, then the # DataTransfer will be read-only whenever it should be protected, and will not # be disconnected after a drag event is completed. - name: dom.events.dataTransfer.protected.enabled type: bool value: false mirror: always # Whether to hide normal files (i.e. non-images) in dataTransfer inside # the content process. - name: dom.events.dataTransfer.mozFile.enabled type: bool value: true mirror: always - name: dom.events.dataTransfer.imageAsFile.enabled type: bool value: false mirror: always # User interaction timer interval, in ms - name: dom.events.user_interaction_interval type: uint32_t value: 5000 mirror: always # Whether to try to compress touchmove events on IPC layer. - name: dom.events.compress.touchmove type: bool value: true mirror: always # In addition to the above IPC layer compresison, allow touchmove # events to be further coalesced in the child side after they # are sent. - name: dom.events.coalesce.touchmove type: bool value: true mirror: always # Allow mousemove events to be coalesced in the child side after they are sent. - name: dom.events.coalesce.mousemove type: bool value: true mirror: always # Expose Window.TextEvent and make the builtin editors dispatch `textInput` # event as a default action of `beforeinput`. - name: dom.events.textevent.enabled type: bool value: true mirror: always # Whether to expose test interfaces of various sorts - name: dom.expose_test_interfaces type: bool value: false mirror: always - name: dom.fetchKeepalive.enabled type: RelaxedAtomicBool value: true mirror: always # The maximum number of pending fetch keepalive requests per browser instance - name: dom.fetchKeepalive.total_request_limit type: RelaxedAtomicUint32 value: 500 mirror: always # The maximum number of pending fetch keepalive requests per origin - name: dom.fetchKeepalive.request_limit_per_origin type: RelaxedAtomicUint32 value: 250 mirror: always - name: dom.fetchObserver.enabled type: RelaxedAtomicBool value: false mirror: always # Whether to set the incremental flag on the top level document's # priority header - name: dom.document_priority.incremental type: RelaxedAtomicBool value: true mirror: always # Allow the content process to create a File from a path. This is allowed just # on parent process, on 'file' Content process, or for testing. - name: dom.file.createInChild type: RelaxedAtomicBool value: false mirror: always # Support @autocomplete values for form autofill feature. - name: dom.forms.autocomplete.formautofill type: bool value: false mirror: always # Only trusted submit event could trigger form submission. - name: dom.forms.submit.trusted_event_only type: bool value: false mirror: always # This pref just controls whether we format the number with grouping separator # characters when the internal value is set or updated. It does not stop the # user from typing in a number and using grouping separators. - name: dom.forms.number.grouping type: bool value: false mirror: always # The interval in milliseconds between two Escape key events where the second # key event will exit fullscreen, even if it is consumed. - name: dom.fullscreen.force_exit_on_multiple_escape_interval type: uint32_t value: 500 mirror: always # Whether the Gamepad API is enabled - name: dom.gamepad.enabled type: bool value: true mirror: always # Is Gamepad Extension API enabled? - name: dom.gamepad.extensions.enabled type: bool value: true mirror: always # Is LightIndicator API enabled in Gamepad Extension API? - name: dom.gamepad.extensions.lightindicator type: bool value: false mirror: always # Is MultiTouch API enabled in Gamepad Extension API? - name: dom.gamepad.extensions.multitouch type: bool value: false mirror: always # Is Gamepad vibrate haptic feedback function enabled? - name: dom.gamepad.haptic_feedback.enabled type: bool value: true mirror: always - name: dom.gamepad.non_standard_events.enabled type: bool value: @IS_NOT_RELEASE_OR_BETA@ mirror: always - name: dom.gamepad.test.enabled type: RelaxedAtomicBool value: false mirror: always # W3C draft ImageCapture API - name: dom.imagecapture.enabled type: bool value: false mirror: always # The root margin for image lazy loading, defined as four (value, percentage) # pairs. - name: dom.image-lazy-loading.root-margin.top type: float value: 600 mirror: always - name: dom.image-lazy-loading.root-margin.top.percentage type: bool value: false mirror: always - name: dom.image-lazy-loading.root-margin.bottom type: float value: 600 mirror: always - name: dom.image-lazy-loading.root-margin.bottom.percentage type: bool value: false mirror: always - name: dom.image-lazy-loading.root-margin.left type: float value: 600 mirror: always - name: dom.image-lazy-loading.root-margin.left.percentage type: bool value: false mirror: always - name: dom.image-lazy-loading.root-margin.right type: float value: 600 mirror: always - name: dom.image-lazy-loading.root-margin.right.percentage type: bool value: false mirror: always # Enable indexedDB in private browsing mode with encryption - name: dom.indexedDB.privateBrowsing.enabled type: RelaxedAtomicBool value: true mirror: always # A pref that is used to slow down connection idle maintenance for testing # purposes. - name: dom.indexedDB.connectionIdleMaintenance.pauseOnConnectionThreadMs type: RelaxedAtomicUint32 value: 0 mirror: always # Whether or not indexedDB test mode is enabled. - name: dom.indexedDB.testing type: RelaxedAtomicBool value: false mirror: always # Whether or not indexedDB experimental features are enabled. - name: dom.indexedDB.experimental type: RelaxedAtomicBool value: false mirror: always # Whether or not indexedDB preprocessing is enabled. - name: dom.indexedDB.preprocessing type: RelaxedAtomicBool value: false mirror: always # A pref that is used to slow down database initialization for testing purposes. - name: dom.indexedDB.databaseInitialization.pauseOnIOThreadMs type: RelaxedAtomicUint32 value: 0 mirror: always # How innerWidth / innerHeight return rounded or fractional sizes. # 0 or others: Do not round at all. # 1: Round. # 2: Truncate. # NOTE(emilio): Fractional sizes are not web-compatible, see the regressions # from bug 1676843 , but we want to expose the fractional sizes (probably in # another API) one way or another, see [1], so we're keeping the code for the # time being. # [1]: - name: dom.innerSize.rounding type: uint32_t value: 2 mirror: always # Whether we conform to Input Events Level 1 or Input Events Level 2. # true: conforming to Level 1 # false: conforming to Level 2 - name: dom.input_events.conform_to_level_1 type: bool value: true mirror: always # Whether we allow BrowsingContextGroup to suspend input events - name: dom.input_events.canSuspendInBCG.enabled type: bool value: false mirror: always # The minimum number of ticks after page navigation # that need to occur before user input events are allowed to be handled. - name: dom.input_events.security.minNumTicks type: uint32_t value: 3 mirror: always # The minimum elapsed time (in milliseconds) after page navigation # for user input events are allowed to be handled. - name: dom.input_events.security.minTimeElapsedInMS type: uint32_t value: 100 mirror: always # By default user input handling delay is disabled (mostly) for testing , # this is used for forcefully enable it for certain tests. - name: dom.input_events.security.isUserInputHandlingDelayTest type: bool value: false mirror: always # The maximum time (milliseconds) we reserve for handling input events in each # frame. - name: dom.input_event_queue.duration.max type: uint32_t value: 8 mirror: always - name: dom.interactive_widget_default_resizes_visual type: RelaxedAtomicBool value: true mirror: always # How often to check for CPOW timeouts (ms). CPOWs are only timed # out by the hang monitor. - name: dom.ipc.cpow.timeout type: uint32_t value: 500 mirror: always #ifdef MOZ_ENABLE_FORKSERVER - name: dom.ipc.forkserver.enable type: bool #if defined(MOZ_CODE_COVERAGE) || defined(MOZ_ASAN) || defined(MOZ_TSAN) || defined(MOZ_MSAN) || defined(MOZ_UBSAN) || defined(MOZ_PROFILE_GENERATE) value: false #else value: false #endif mirror: once #endif #ifdef MOZ_WIDGET_GTK # Avoid the use of GTK in content processes if possible, by running # them in headless mode, to conserve resources (e.g., connections to # the X server). See the usage in `ContentParent.cpp` for the full # definition of "if possible". # This does not affect sandbox policies; content processes may still # dynamically connect to the display server for, e.g., WebGL. - name: dom.ipc.avoid-gtk type: bool value: true mirror: always #endif # Whether or not to collect a paired minidump when force-killing a # content process. - name: dom.ipc.tabs.createKillHardCrashReports type: bool value: @IS_NOT_RELEASE_OR_BETA@ mirror: once # Enable e10s hang monitoring (slow script checking and plugin hang detection). - name: dom.ipc.processHangMonitor type: bool value: true mirror: once # Whether we report such process hangs - name: dom.ipc.reportProcessHangs type: RelaxedAtomicBool # Don't report hangs in DEBUG builds. They're too slow and often a # debugger is attached. #ifdef DEBUG value: false #else value: true #endif mirror: always # If true, disables non-required re-use of content processes. This can be used # in tests to force a new process to be used whenever a process selection # decision is made. Setting this pref can cause dom.ipc.processCount limits to # be exceeded. # WARNING: This will exceed even process limits for the extension or # privilegedAbout remote types, which may lead to unexpected breakage! # Should only be used for testing. - name: dom.ipc.disableContentProcessReuse type: bool value: false mirror: always # If non-zero, a grace delay (in milliseconds) during which unused content # processes are kept available for re-use to avoid unnecessary process churn. - name: dom.ipc.processReuse.unusedGraceMs type: uint32_t value: 0 mirror: always # Process launch delay (in milliseconds). - name: dom.ipc.processPrelaunch.delayMs type: uint32_t # This number is fairly arbitrary ... the intention is to put off # launching another app process until the last one has finished # loading its content, to reduce CPU/memory/IO contention. value: 1000 mirror: always - name: dom.ipc.processPrelaunch.startupDelayMs type: uint32_t # delay starting content processes for a short time after browser start # to provide time for the UI to come up value: 1000 mirror: always # Process preallocation cache # Only used in fission; in e10s we use 1 always - name: dom.ipc.processPrelaunch.fission.number type: uint32_t value: 3 mirror: always # Limit preallocated processes below this memory size (in MB) - name: dom.ipc.processPrelaunch.lowmem_mb type: uint32_t value: 4096 mirror: always - name: dom.ipc.processPriorityManager.enabled type: bool value: true mirror: always - name: dom.ipc.processPriorityManager.testMode type: bool value: false mirror: always - name: dom.ipc.processPriorityManager.backgroundPerceivableGracePeriodMS type: uint32_t #if defined(MOZ_WIDGET_ANDROID) && defined(NIGHTLY_BUILD) value: 3000 #else value: 0 #endif mirror: always - name: dom.ipc.processPriorityManager.backgroundGracePeriodMS type: uint32_t #if defined(MOZ_WIDGET_ANDROID) && defined(NIGHTLY_BUILD) value: 3000 #else value: 0 #endif mirror: always #ifdef XP_WIN - name: dom.ipc.processPriorityManager.backgroundUsesEcoQoS type: bool value: false mirror: always #endif # Support for input type=month, type=week. By default, disabled. - name: dom.forms.datetime.others type: bool value: @IS_ANDROID@ mirror: always - name: dom.forms.always_allow_pointer_events.enabled type: bool value: true mirror: always # Is support for key events and focus events on disabled elements enabled? - name: dom.forms.always_allow_key_and_focus_events.enabled type: bool value: @IS_EARLY_BETA_OR_EARLIER@ mirror: always # Whether to disable only the descendants or the parent fieldset element too # Note that this still allows it to be selected by `:disable`. - name: dom.forms.fieldset_disable_only_descendants.enabled type: bool value: @IS_EARLY_BETA_OR_EARLIER@ mirror: always # Does mousewheel-scrolling over a focused or # field cause the value to increase/decrease (rather # than scrolling the page)? - name: dom.input.number_and_range_modified_by_mousewheel type: RelaxedAtomicBool value: false mirror: always # Whether to allow or disallow web apps to cancel `beforeinput` events caused # by MozEditableElement#setUserInput() which is used by autocomplete, autofill # and password manager. - name: dom.input_event.allow_to_cancel_set_user_input type: bool value: false mirror: always # How long a content process can take before closing its IPC channel # after shutdown is initiated. If the process exceeds the timeout, # we fear the worst and kill it. - name: dom.ipc.tabs.shutdownTimeoutSecs type: RelaxedAtomicUint32 #if !defined(DEBUG) && !defined(MOZ_ASAN) && !defined(MOZ_VALGRIND) && !defined(MOZ_TSAN) value: 20 #else value: 0 #endif mirror: always # Whether a native event loop should be used in the content process. - name: dom.ipc.useNativeEventProcessing.content type: RelaxedAtomicBool #if defined(XP_WIN) || defined(XP_MACOSX) value: false #else value: true #endif mirror: always # If this is true, TextEventDispatcher dispatches keydown and keyup events # even during composition (keypress events are never fired during composition # even if this is true). - name: dom.keyboardevent.dispatch_during_composition type: bool value: true mirror: always # Enable/disable KeyboardEvent.initKeyEvent function - name: dom.keyboardevent.init_key_event.enabled type: bool value: false mirror: always # Enable/disable KeyboardEvent.initKeyEvent function in addons even if it's # disabled. - name: dom.keyboardevent.init_key_event.enabled_in_addons type: bool value: @IS_NOT_NIGHTLY_BUILD@ mirror: always # If this is true, keypress events for non-printable keys are dispatched only # for event listeners of the system event group in web content. - name: dom.keyboardevent.keypress.dispatch_non_printable_keys_only_system_group_in_content type: bool value: true mirror: always # If this is true, "keypress" event's keyCode value and charCode value always # become same if the event is not created/initialized by JS. - name: dom.keyboardevent.keypress.set_keycode_and_charcode_to_same_value type: bool value: true mirror: always # Whether "W3C Web Manifest" processing is enabled - name: dom.manifest.enabled type: bool value: true mirror: always # Enable mapped array buffer by default. - name: dom.mapped_arraybuffer.enabled type: bool value: true mirror: always # Autoplay Policy Detection - name: dom.media.autoplay-policy-detection.enabled type: RelaxedAtomicBool value: true mirror: always # WebCodecs API - name: dom.media.webcodecs.enabled type: RelaxedAtomicBool #if defined(MOZ_WIDGET_ANDROID) value: @IS_NIGHTLY_BUILD@ #else value: true #endif mirror: always # WebCodecs API - Image decoder - name: dom.media.webcodecs.image-decoder.enabled type: RelaxedAtomicBool value: @IS_NIGHTLY_BUILD@ mirror: always # Number of seconds of very quiet or silent audio before considering the audio # inaudible. - name: dom.media.silence_duration_for_audibility type: AtomicFloat value: 2.0f mirror: always # Inform mozjemalloc that the foreground content processes can keep more dirty # pages in memory. - name: dom.memory.foreground_content_processes_have_larger_page_cache type: bool value: true mirror: always # 0 no-op # 1 free dirty mozjemalloc pages # 2 trigger memory-pressure/heap-minimize # 3 trigger memory-pressure/low-memory - name: dom.memory.memory_pressure_on_background type: uint32_t value: 0 mirror: always # Enable meta-viewport support in remote APZ-enabled frames. - name: dom.meta-viewport.enabled type: RelaxedAtomicBool value: false mirror: always # Timeout clamp in ms for timeouts we clamp. - name: dom.min_timeout_value type: RelaxedAtomicInt32 value: 4 mirror: always # Timeout clamp in ms for background windows. - name: dom.min_background_timeout_value type: int32_t value: 1000 mirror: always # Timeout clamp in ms for background windows when throttling isn't enabled. - name: dom.min_background_timeout_value_without_budget_throttling type: int32_t value: 1000 mirror: always # Are missing-property use counters for certain DOM attributes enabled? - name: dom.missing_prop_counters.enabled type: bool value: true mirror: always # Whether to dispatch mutation events. - name: dom.mutation_events.enabled type: bool value: true mirror: always # Limit of location change caused by content scripts in a time span per # BrowsingContext. This includes calls to History and Location APIs. - name: dom.navigation.navigationRateLimit.count type: uint32_t value: 200 mirror: always # Time span in seconds for location change rate limit. - name: dom.navigation.navigationRateLimit.timespan type: uint32_t value: 10 mirror: always # Whether to allow