# 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 http://mozilla.org/MPL/2.0/. # yaml-language-server: $schema=schemas/ExperimentFeatureManifest.schema.json # Features must be added here to be accessible through the NimbusFeature API. "no-feature-firefox-desktop": description: A dummy feature for experiments that target no feature. owner: barret@mozilla.com applications: - firefox-desktop - firefox-desktop-background-task hasExposure: false variables: {} testFeature: description: Test only feature owner: barret@mozilla.com applications: - firefox-desktop - firefox-desktop-background-task hasExposure: false isEarlyStartup: true variables: enabled: type: boolean description: Whether or not this feature is enabled testInt: type: int fallbackPref: nimbus.testing.testInt description: Int pref used by platform API tests testSetString: type: string setPref: branch: user pref: nimbus.testing.testSetString description: A string pref set by Nimbus tests nimbus-qa-1: description: A feature for testing pref-setting on the default branch. owner: barret@mozilla.com hasExposure: false variables: value: type: string setPref: branch: default pref: nimbus.qa.pref-1 description: The value to set for the pref. nimbus-qa-2: description: A feature for testing pref-setting on the user branch. owner: barret@mozilla.com hasExposure: false variables: value: type: string setPref: branch: user pref: nimbus.qa.pref-2 description: The value to set for the pref. # `search` is for search engine experimentation features which do not require # isEarlyStartup to be set. search: description: Search engine experimentation support and testing features. owner: search-and-suggest-program@mozilla.com hasExposure: false variables: extraParams: type: json description: >- This allows extra parameters to be set for search engines requests including, where calls to the suggestions API, the search engine configuration defines those parameters. The use of this field should be coordinated with the Search team. The field value is an array of objects with key/value fields. For example: [ {"key": "google_channel_row", "value": "foo"} ] This is matched to a section in the search configuration: "extraParams": [ { "name": "channel", "pref": "google_channel_row", "condition": "pref" } ], In this case, the resulting URL for the appropriate search engine would have `&channel=foo` added to the URL when doing searches. If the key is not referenced in the search configuration, then no parameter will be added. Only the search team can update the configuration. richSuggestionsFeatureGate: type: boolean setPref: branch: default pref: browser.urlbar.richSuggestions.featureGate description: >- Feature gate that controls whether Rich Suggestions are enabled. serpEventTelemetryEnabled: type: boolean setPref: branch: default pref: browser.search.serpEventTelemetry.enabled description: Whether the Glean SERP event telemetry is enabled. serpEventTelemetryCategorizationEnabled: type: boolean setPref: branch: default pref: browser.search.serpEventTelemetryCategorization.enabled description: Whether the Glean SERP event telemetry for SERP categorization is enabled. trendingEnabled: type: boolean setPref: branch: default pref: browser.urlbar.trending.featureGate description: Feature gate that controls whether trending suggestions are enabled. trendingRequireSearchMode: type: boolean setPref: branch: default pref: browser.urlbar.trending.requireSearchMode description: Controls whether trending suggestions are only shown in search mode or not. trendingMaxResultsNoSearchMode: type: int setPref: branch: default pref: browser.urlbar.trending.maxResultsNoSearchMode description: The maximum number of trending results mode outside search mode. newSearchConfigEnabled: type: boolean setPref: branch: user pref: browser.search.newSearchConfig.enabled description: >- Whether search-config-v2 is enabled for the user. This will only take effect when the user restarts. # `searchConfiguration` is for search experiment features for items that require # isEarlyStartup to be true. These items may require a reload of the search # engine configuration, and an additional reload may happen during the startup # process. searchConfiguration: description: Search experimentation support for the engine configuration owner: search-and-suggest-program@mozilla.com isEarlyStartup: true hasExposure: false variables: experiment: type: string fallbackPref: browser.search.experiment description: >- Used to activate only matching configurations that contain the value in `experiment` seperatePrivateDefaultUIEnabled: type: boolean description: Whether the UI for the separate private default feature is enabled. seperatePrivateDefaultUrlbarResultEnabled: type: boolean description: Whether the urlbar result for the separate private default is shown. urlbar: description: The Address Bar owner: search-and-suggest-program@mozilla.com hasExposure: true exposureDescription: >- The timing of the exposure event depends on the experiment, but generally the event is recorded once per app session when the user first encounters the UI of the experiment in which they're enrolled. variables: addonsFeatureGate: type: boolean fallbackPref: browser.urlbar.addons.featureGate description: >- Feature gate that controls whether all aspects of the addons suggestion feature are exposed to the user. addonsShowLessFrequentlyCap: type: int description: >- If defined and non-zero, this is the maximum number of times the user will be able to click the "Show less frequently" command for addon suggestions. If undefined or zero, the user will be able to click the command without any limit. autoFillAdaptiveHistoryEnabled: type: boolean fallbackPref: browser.urlbar.autoFill.adaptiveHistory.enabled description: Whether enabling adaptive history autofill. autoFillAdaptiveHistoryMinCharsThreshold: type: int fallbackPref: browser.urlbar.autoFill.adaptiveHistory.minCharsThreshold description: Minimum char length of the user's search string to trigger adaptive history autofill. autoFillAdaptiveHistoryUseCountThreshold: type: string description: This value assumes float expression like "0.47". Threshold for use count of input history that we handle as adaptive history autofill. If the use count is this value or more, it will be a candidate. experimentType: type: string description: The type of the experiment (or rollout). If "best-match", then the Nimbus exposure event will be recorded when the user first triggers a best match (or would have triggered a best match, for users in the control group). If empty, the event will be recorded when the user first triggers any type of Suggest suggestion. enum: - best-match - "" mdnFeatureGate: type: boolean setPref: branch: default pref: browser.urlbar.mdn.featureGate description: >- Feature gate that controls whether all aspects of the mdn suggestion feature are exposed to the user. merinoClientVariants: type: string fallbackPref: browser.urlbar.merino.clientVariants description: >- Comma separated list of client variants to report to the Merino server. May impact server behavior. merinoEndpointURL: type: string fallbackPref: browser.urlbar.merino.endpointURL description: >- The Merino endpoint URL, not including parameters. An empty string will cause Firefox not to fetch from Merino. merinoProviders: type: string fallbackPref: browser.urlbar.merino.providers description: >- Comma-separated list of providers to request from the Merino server. Merino will return suggestions only for these providers. merinoTimeoutMs: type: int fallbackPref: browser.urlbar.merino.timeoutMs description: Timeout for Merino fetches (ms) exposureResults: type: string setPref: branch: default pref: browser.urlbar.exposureResults description: >- Comma-separated list of result type combinations, that are used to determine if an exposure event should be fired. showExposureResults: type: boolean setPref: branch: default pref: browser.urlbar.showExposureResults description: >- Boolean used to determine if the results defined in `exposureResults` should be shown in search results. Should be false for Control branch of an experiment. pocketFeatureGate: type: boolean fallbackPref: browser.urlbar.pocket.featureGate description: >- Feature gate that controls whether all aspects of the Pocket suggestions feature are exposed to the user. pocketShowLessFrequentlyCap: type: int description: >- If defined and non-zero, this is the maximum number of times the user will be able to click the "Show less frequently" command for Pocket suggestions. If undefined or zero, the user will be able to click the command without any limit. potentialExposureKeywords: type: json fallbackPref: browser.urlbar.potentialExposureKeywords description: >- An array of keyword strings that will trigger the `urlbar-potential-exposure` ping when the user types one during a urlbar session. quickSuggestAllowPositionInSuggestions: type: boolean fallbackPref: browser.urlbar.quicksuggest.allowPositionInSuggestions description: Whether quick suggest results can be shown in position specified in the suggestions. quickSuggestContextualOptInEnabled: type: boolean setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn description: Whether the Firefox Suggest contextual opt-in result is enabled. If true, this implicitly disables shouldShowOnboardingDialog. quickSuggestContextualOptInSayHello: type: boolean setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn.sayHello description: Controls which variant of the copy is used for the Firefox Suggest contextual opt-in result. quickSuggestContextualOptInTopPosition: type: boolean setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn.topPosition description: Controls whether the Firefox Suggest contextual opt-in result appears at the top of results or at the bottom, after one-off buttons. quickSuggestDataCollectionEnabled: type: boolean description: Whether data collection should be enabled by default. If this variable is specified, it will override the value implied by the scenario. It will never override the user's local preference to disable (or enable) data collection, if the user has already toggled that preference. quickSuggestEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.enabled description: Gate for the Firefox Suggest feature as a whole. If false, the Firefox Suggest preferences UI and Suggest suggestions will not be shown. If true, the preferences UI will be shown, and the user can turn suggestions on or off. quickSuggestImpressionCapsSponsoredEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.impressionCaps.sponsoredEnabled description: Whether sponsored suggestions are subject to impression frequency caps. If false, sponsored suggestions can be shown an unlimited number of times over any given period. If true, sponsored suggestion impressions will be subject to the caps in the remote settings configuration. quickSuggestImpressionCapsNonSponsoredEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.impressionCaps.nonSponsoredEnabled description: Whether non-sponsored suggestions are subject to impression frequency caps. If false, non-sponsored suggestions can be shown an unlimited number of times over any given period. If true, non-sponsored suggestion impressions will be subject to the caps in the remote settings configuration. quickSuggestNonSponsoredEnabled: type: boolean description: Whether non-sponsored suggestions should be enabled by default. If this variable is specified, it will override the value implied by the scenario. It will never override the user's local preference to disable (or enable) non-sponsored suggestions, if the user has already toggled that preference. quickSuggestNonSponsoredIndex: type: int fallbackPref: browser.urlbar.quicksuggest.nonSponsoredIndex description: >- The index of non-sponsored QuickSuggest results within the general group. A negative index is relative to the end of the group quickSuggestOnboardingDialogVariation: type: string description: >- Specify the messages/UI variation for QuickSuggest onboarding dialog. This value is case insensitive. quickSuggestRemoteSettingsDataType: type: string description: The `type` of the suggestions data in remote settings. If not specified, "data" is used. quickSuggestRustEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.rustEnabled description: >- Whether Firefox Suggest will use the new Rust backend instead of the original JS backend. quickSuggestScenario: # IMPORTANT: This should not have a fallbackPref. See UrlbarPrefs.sys.mjs. type: string description: The Firefox Suggest scenario in which the user is enrolled enum: - history - offline - online quickSuggestScoreMap: type: json description: >- A JSON object that maps telemetry result types to suggestion scores. If a telemetry result type is present in this map, the client will use the corresponding score as the score for all suggestions of the type, overriding all other sources of scores for the type. In other words, the scores in this map will override scores that are set in remote settings and Merino as well as scores that are hardcoded in the client. Example entries: `"amo": 0.5`, `"adm_sponsored": 0.9` quickSuggestShouldShowOnboardingDialog: type: boolean fallbackPref: browser.urlbar.quicksuggest.shouldShowOnboardingDialog description: Whether or not to show the QuickSuggest onboarding dialog quickSuggestShowOnboardingDialogAfterNRestarts: type: int fallbackPref: browser.urlbar.quicksuggest.showOnboardingDialogAfterNRestarts description: Show QuickSuggest onboarding dialog after N browser restarts quickSuggestSponsoredEnabled: type: boolean description: Whether sponsored suggestions should be enabled by default. If this variable is specified, it will override the value implied by the scenario. It will never override the user's local preference to disable (or enable) sponsored suggestions, if the user has already toggled that preference. quickSuggestSponsoredIndex: type: int fallbackPref: browser.urlbar.quicksuggest.sponsoredIndex description: >- The index of sponsored QuickSuggest results within the general group. A negative index is relative to the end of the group quickSuggestSponsoredPriority: type: boolean fallbackPref: browser.urlbar.quicksuggest.sponsoredPriority description: >- Whether or not showing sponsored suggestion as priority. If this variable is true, the following things are processed. * "Sponsored" label is shown as the group label. * Change the suggested index to 1. * Handle as top pick. recentSearchesFeatureGate: type: boolean setPref: branch: default pref: browser.urlbar.recentsearches.featureGate description: Gate for the recent searches feature. recentSearchesMaxResults: type: int setPref: branch: default pref: browser.urlbar.recentsearches.maxResults description: The maximum number of recent searches to show. recordNavigationalSuggestionTelemetry: type: boolean description: Whether to record navigational suggestion telemetry. Defaults to false. showSearchTermsFeatureGate: type: boolean fallbackPref: browser.urlbar.showSearchTerms.featureGate description: Gate for the show search terms feature. If false, the preference#search will not show the search terms feature checkbox, and search terms will never persist in the urlbar. If true, the preference checkbox will be shown on preferences#search, and the user can choose to persist search terms on or off in the urlbar. weatherFeatureGate: type: boolean fallbackPref: browser.urlbar.weather.featureGate description: >- Feature gate that controls whether all aspects of the weather suggestion feature are exposed to the user. See also `weatherKeywords` and `weatherKeywordsMinimumLength`. In summary: To enable the weather suggestion, set `weatherFeatureGate` to true, `weatherKeywords` to an array of full keyword strings, and `weatherKeywordsMinimumLength` to a non-zero integer. To disable the weather suggestion, leave out all weather-related variables. weatherKeywords: type: json description: >- An array of full keyword strings that will trigger the weather suggestion when the user types them in the address bar. If absent or null, Firefox will fall back to the weather keywords defined in remote settings. If neither Nimbus nor remote settings defines any keywords, the weather suggestion will be disabled. See also `weatherKeywordsMinimumLength`. weatherKeywordsMinimumLength: type: int description: >- If defined and non-zero, the weather suggestion will be triggered by typing any prefix of a full weather keyword when the prefix is at least `weatherKeywordsMinimumLength` characters long. If this variable is absent or zero, Firefox will fall back to the minimum length defined in remote settings. If neither Nimbus nor remote settings defines a minimum length, only full keywords will trigger the suggestion. See also `weatherKeywords`. weatherKeywordsMinimumLengthCap: type: int description: >- If defined and non-zero, the user will not be able to increment the minimum keyword length beyond this value. e.g., if this value is 6, the current minimum length is 5, and the user clicks "Show less frequently", then the minimum length will be incremented to 6, the "Show less frequently" command will be hidden, and the user can continue to trigger the weather suggestion by typing 6 characters, but they will not be able to increment the minimum length any further. If this variable is absent or zero, Firefox will fall back to the cap defined in remote settings. If neither Nimbus nor remote settings defines a cap, no cap will be used, and the user will be able to increment the minimum length without any limit. weatherSimpleUI: type: boolean description: >- If true, show the weather suggestion by simple UI edition as follows. * Remove the forcast text from the summary text. yelpMinKeywordLength: type: int description: >- The minimum prefix length of a Yelp keyword the user must type to trigger the suggestion. yelpFeatureGate: type: boolean fallbackPref: browser.urlbar.yelp.featureGate description: >- Feature gate that controls whether all aspects of the Yelp suggestion feature are exposed to the user. yelpShowLessFrequentlyCap: type: int fallbackPref: browser.urlbar.yelp.showLessFrequentlyCap description: >- If defined and non-zero, this is the maximum number of times the user will be able to click the "Show less frequently" command for Yelp suggestions. If undefined or zero, the user will be able to click the command without any limit. yelpSuggestNonPriorityIndex: type: int fallbackPref: browser.urlbar.yelp.suggestedIndex description: >- The group-relative suggestedIndex of Yelp suggestions within the Firefox Suggest section. Ignored when `yelpSuggestPriority` is true. yelpSuggestPriority: type: boolean fallbackPref: browser.urlbar.yelp.priority description: >- Whether or not showing yelp suggestion as priority. If this variable is true, the following things are processed. * Change the suggested index to 1. * Handle as top pick. originsAlternativeEnable: description: >- Use an alternative ranking algorithm for autofilling origins, that is mainly domains of Web pages. When the user types the beginning of an origin, we autofill the whole origin. Whether autofill happens depends on the ranking algorithm. Bookmarks are always autofilled anyway. type: boolean setPref: branch: user pref: "places.frecency.origins.alternative.featureGate" originsDaysCutOff: description: >- The alternative ranking algorithm only considers pages visited in the last N days, where N is controlled by this variable. type: int setPref: branch: user pref: "places.frecency.origins.alternative.daysCutOff" pagesAlternativeEnable: description: >- Use an alternative ranking algorithm for sorting history and bookmarks among the urlbar results. type: boolean setPref: branch: user pref: "places.frecency.pages.alternative.featureGate" pagesNumSampledVisits: description: >- The number of recent visits to sample when calculating the ranking of a page. Examining all the visits would be expensive, so we only sample recent visits. type: int setPref: branch: user pref: "places.frecency.pages.alternative.numSampledVisits" pagesHalfLifeDays: description: >- The number of days after which the ranking halves. This implements the "recency" part of the algorithm. type: int setPref: branch: user pref: "places.frecency.pages.alternative.halfLifeDays" pagesHighWeight: description: >- The weight to use for the high importance bucket. type: int setPref: branch: user pref: "places.frecency.pages.alternative.highWeight" pagesMediumWeight: description: >- The weight to use for the medium importance bucket. type: int setPref: branch: user pref: "places.frecency.pages.alternative.mediumWeight" pagesLowWeight: description: >- The weight to use for the low importance bucket. type: int setPref: branch: user pref: "places.frecency.pages.alternative.lowWeight" aboutwelcome: description: "The about:welcome page" owner: omc@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent once per browsing session when the about:welcome URL is first accessed. isEarlyStartup: true variables: enabled: type: boolean fallbackPref: browser.aboutwelcome.enabled description: >- Should users see about:welcome? If this is false, users will see a regular new tab instead. id: type: string description: >- Descriptive ID for the about:welcome content screens: type: json fallbackPref: browser.aboutwelcome.screens description: Content to show in the onboarding flow languageMismatchEnabled: type: boolean fallbackPref: intl.multilingual.aboutWelcome.languageMismatchEnabled description: >- Suggest to change the language on about:welcome when there is a mismatch with the OS. transitions: type: boolean description: Enable transition effect between screens showModal: type: boolean fallbackPref: browser.aboutwelcome.showModal description: >- Should users see window modal onboarding backdrop: type: string fallbackPref: browser.aboutwelcome.backdrop description: >- Specify the color to be used to update the background color newtabUrlBarFocus: type: boolean fallbackPref: browser.aboutwelcome.newtabUrlBarFocus description: >- Should the urlbar be focused when the new tab page loads after new user onboarding toolbarButtonEnabled: type: boolean setPref: branch: user pref: browser.aboutwelcome.toolbarButtonEnabled description: >- Should the return to about:welcome toolbar button be shown moreFromMozilla: description: "New page on about:preferences to suggest more Mozilla products" owner: omc@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent once per browsing session when the about:preferences URL is first accessed. variables: enabled: type: boolean fallbackPref: browser.preferences.moreFromMozilla description: Should users see the new more from Mozilla section. template: type: string fallbackPref: browser.preferences.moreFromMozilla.template description: UI template used to display Mozilla products. Possible values simple, advanced. Default is simple. windowsLaunchOnLogin: description: "New checkbox in about:preferences startup section to start Firefox on Windows login" owner: omc@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent once per browsing session when the about:preferences URL is first accessed. variables: enabled: type: boolean setPref: branch: default pref: browser.startup.windowsLaunchOnLogin.enabled description: Should users see the Windows launch on login checkbox. windowsJumpList: description: "Controls for the Windows Jump List integration." owner: mconley@mozilla.com hasExposure: false variables: legacyBackend: type: boolean setPref: branch: user pref: browser.taskbar.lists.legacyBackend description: True if users should use the legacy Windows Jump List backend. abouthomecache: description: "The startup about:home cache." owner: omc@mozilla.com hasExposure: false isEarlyStartup: true variables: enabled: type: boolean fallbackPref: browser.startup.homepage.abouthome_cache.enabled description: Is the feature enabled? newtab: description: "The about:newtab page" owner: omc@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent once per browsing session when the first newtab page loads (either about:newtab or about:home). isEarlyStartup: true variables: newTheme: type: boolean description: Enable the new theme customizationMenuEnabled: type: boolean fallbackPref: browser.newtabpage.activity-stream.customizationMenu.enabled description: Enable the customization panel inside of the newtab prefsButtonIcon: type: string description: Icon url to use for the preferences button topSitesContileEnabled: type: boolean fallbackPref: browser.topsites.contile.enabled description: Enable the Contile integration for Sponsored Top Sites topSitesUseAdditionalTilesFromContile: type: boolean description: Allow Contile to use additonal sponsored top sites pocketNewtab: description: The Pocket section in newtab owner: sdowne@getpocket.com hasExposure: false isEarlyStartup: true variables: spocPositions: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spoc-positions description: CSV string of spoc position indexes on newtab Pocket grid spocTopsitesPositions: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spoc-topsites-positions description: CSV string of spoc position indexes on newtab topsites section contileTopsitesPositions: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.contile-topsites-positions description: CSV string of contile position indexes on newtab topsites section spocAdTypes: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spocAdTypes description: CSV string of data to set the spoc content. spocZoneIds: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spocZoneIds description: CSV string of data to set the spoc content. spocTopsitesAdTypes: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spocTopsitesAdTypes description: CSV string of data to set the spoc content. spocTopsitesZoneIds: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spocTopsitesZoneIds description: CSV string of data to set the spoc content. spocTopsitesPlacementEnabled: type: boolean fallbackPref: browser.newtabpage.activity-stream.discoverystream.spocTopsitesPlacement.enabled description: Tuns on and off the sponsored topsites placement. spocSiteId: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spocSiteId description: String ID to set the spoc content. widgetPositions: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.widget-positions description: CSV string of widget position indexes on newtab grid hybridLayout: type: boolean fallbackPref: browser.newtabpage.activity-stream.discoverystream.hybridLayout.enabled description: Enable compact cards on newtab grid only for specific breakpoints hideCardBackground: type: boolean fallbackPref: browser.newtabpage.activity-stream.discoverystream.hideCardBackground.enabled description: Removes Pocket card background and borders. fourCardLayout: type: boolean fallbackPref: browser.newtabpage.activity-stream.discoverystream.fourCardLayout.enabled description: Enable four Pocket cards per row. newFooterSection: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.newFooterSection.enabled description: Enable an updated Pocket section topics footer saveToPocketCard: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.saveToPocketCard.enabled description: >- A save to Pocket button inside the card, shown on the card thumbnail, on hover. saveToPocketCardRegions: type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.saveToPocketCardRegions description: >- CSV string of regions that support the save to Pocket button inside the card. hideDescriptions: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.hideDescriptions.enabled description: >- Hide or display descriptions for Pocket stories on newtab. hideDescriptionsRegions: type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.hideDescriptionsRegions description: >- CSV string of regions that hide descriptions for Pocket stories on newtab. compactGrid: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.compactGrid.enabled description: >- Reduce the number of pixels between the Pocket cards on newtab. compactImages: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.compactImages.enabled description: >- Reduce the height on Pocket card images on newtab. imageGradient: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.imageGradient.enabled description: >- Add a gradient to the bottom of Pocket card images on newtab to blend the image in with the card. titleLines: type: int fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.titleLines description: >- Changes the maximum number of lines a title can be for Pocket cards on newtab. descLines: type: int fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.descLines description: >- Changes the maximum number of lines a description can be for Pocket cards on newtab. onboardingExperience: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.onboardingExperience.enabled description: >- Enables an onboarding experience for Pocket section on newtab. essentialReadsHeader: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.essentialReadsHeader.enabled description: >- Updates the Pocket section header and title to say "Today’s Essential Reads", moves the "Recommended by Pocket" header to the right side. editorsPicksHeader: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.editorsPicksHeader.enabled description: >- Updates the Pocket section header and title to say "Editor’s Picks", if used with essentialReadsHeader, creates a second section 2 rows down for editorsPicksHeader. recentSavesEnabled: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.recentSaves.enabled description: >- Updates the Pocket section with a new header and 1 row of recently saved Pocket stories. readTime: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.readTime.enabled description: >- Displays an estimated read time for Pocket cards on newtab. newSponsoredLabel: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.newSponsoredLabel.enabled description: >- Updates the sponsored label position to below the image for Pocket cards on newtab. sendToPocket: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.sendToPocket.enabled description: >- Decides what to do when a logged out user click "Save to Pocket" from a Pocket card. wallpapers: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.enabled description: >- Turns on and off wallpaper support. recsPersonalized: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.recs.personalized description: >- Enables Pocket stories personalization. spocsPersonalized: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.spocs.personalized description: >- Enables Pocket sponsored content personalization. spocsCacheTimeout: type: int fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.spocs.cacheTimeout description: >- Set sponsored content cache timeout in minutes. discoveryStreamConfig: description: A JSON blob of discovery stream configuration. type: string setPref: branch: user pref: "browser.newtabpage.activity-stream.discoverystream.config" spocsEndpoint: description: The URL for the spocs endpoint. type: string setPref: branch: user pref: "browser.newtabpage.activity-stream.discoverystream.spocs-endpoint" spocsEndpointAllowlist: description: Comma separated list of allowed endpoints for fetching spocs type: string setPref: branch: user pref: "browser.newtabpage.activity-stream.discoverystream.endpoints" spocsClearEndpoint: description: URL for deleting any server data when a user opts out of sponsored content type: string setPref: branch: user pref: "browser.newtabpage.activity-stream.discoverystream.endpointSpocsClear" ctaButtonSponsors: description: A CSV list of sponsors that should use a button CTA. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.ctaButtonSponsors ctaButtonVariant: description: Specifies which variant to use for any sponsors in ctaButtonSponsors type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.ctaButtonVariant spocMessageVariant: description: Adds some message dialogs explainging sponsored content to the user type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.spocMessageVariant regionStoriesConfig: description: A comma-separated list of region to get stories for. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.region-stories-config regionBffConfig: type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.region-bff-config description: A comma-separated list of regions to get stories from the recommendations BFF. Also requires region-stories-config. regionStoriesBlock: description: A comma-separated list of regions that do not get stories, regardless of locale-list-config. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.region-stories-block localeListConfig: description: A comma-separated list of locales that get stories, regardless of region-stories-config. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.locale-list-config regionSpocsConfig: description: A comma-separated list of regions that get spocs by default. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.region-spocs-config topSitesMaxSponsored: # Defined under `pocketNewtab` as it needs to be used along with other variables type: int description: The maximum number of sponsored Top Sites to be displayed topSitesContileMaxSponsored: # Defined under `pocketNewtab` as it needs to be used along with other variables type: int description: The maximum number of sponsored Top Sites used from Contile topSitesContileSovEnabled: # Defined under `pocketNewtab` as it needs to be used along with other variables description: Enable the Share-of-Voice feature for Sponsored Topsites. type: boolean fallbackPref: >- browser.topsites.contile.sov.enabled saveToPocket: description: The save to Pocket feature owner: sdowne@getpocket.com hasExposure: false variables: emailButton: type: boolean setPref: branch: user pref: extensions.pocket.refresh.emailButton.enabled description: Just for the new Pocket panels, enables the email signup button. hideRecentSaves: type: boolean setPref: branch: user pref: extensions.pocket.refresh.hideRecentSaves.enabled description: Hides the recently saved section in the home panel. bffRecentSaves: type: boolean setPref: branch: user pref: extensions.pocket.bffRecentSaves description: Use the new BFF Proxy Service instead of the legacy Pocket Service for Recent Saves bffApi: type: string setPref: branch: user pref: extensions.pocket.bffApi description: BFF Proxy Service domain oAuthConsumerKeyBff: type: string setPref: branch: user pref: extensions.pocket.oAuthConsumerKeyBff description: BFF Proxy Service OAuth Consumer Key password-autocomplete: description: A special autocomplete UI for password fields. owner: sgalich@mozilla.com hasExposure: false variables: directMigrateSingleProfile: type: boolean description: Enable direct migration? cm-csv-import: description: Importing logins from CSV files owner: issozi@mozilla.com hasExposure: false variables: csvImport: type: boolean description: Can show CSV Import in about:logins or Migration Wizard setPref: branch: default pref: "signon.management.page.fileImport.enabled" # This feature flag mirrors the one used for ios # https://github.com/mozilla-mobile/firefox-ios/blob/main/nimbus-features/addressAutofillFeature.yaml address-autofill-feature: description: Enabling address autofill feature owner: issozi@mozilla.com hasExposure: false variables: status: type: boolean setPref: branch: default pref: extensions.formautofill.addresses.experiments.enabled description: If true, we will allow user to use address autofill shellService: description: "Interface with OS, e.g., pinning and set default" owner: desktop-integrations@mozilla.com hasExposure: false isEarlyStartup: true variables: disablePin: type: boolean description: Disable pin to taskbar feature setDefaultBrowserUserChoice: type: boolean fallbackPref: browser.shell.setDefaultBrowserUserChoice description: Should it set as default browser setDefaultPDFHandler: type: boolean fallbackPref: browser.shell.setDefaultPDFHandler description: Should setting it as the default browser set it as the default PDF handler. setDefaultPDFHandlerOnlyReplaceBrowsers: type: boolean fallbackPref: browser.shell.setDefaultPDFHandler.onlyReplaceBrowsers description: >- Should setting it as the default PDF handler only replace existing PDF handlers that are browsers, and not other PDF handlers such as Acrobat Reader or Nitro PDF. upgradeDialog: description: The dialog shown for major upgrades owner: omc@mozilla.com hasExposure: false isEarlyStartup: true variables: enabled: type: boolean fallbackPref: browser.startup.upgradeDialog.enabled description: Is the feature enabled? cfr: description: "A Firefox Messaging System message for the cfr message channel" owner: omc@mozilla.com hasExposure: true exposureDescription: "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} "moments-page": description: "A Firefox Messaging System message for the moments-page message channel" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} infobar: description: "A Firefox Messaging system message for the infobar message channel" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} spotlight: description: "A Firefox Messaging System message for the spotlight message channel" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} # Before 117, this feature only included one variable, pdfJsTourProgress. So, # the minimum version for messaging experiments using this feature ID is 117. featureCallout: description: "A Firefox Messaging System message for the Feature Callout message channel" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fullPageTranslation: description: This feature opens a popup panel to offer to translate a page. owner: gtatum@mozilla.com hasExposure: false variables: boolean: description: Set to true to enable the translations feature type: boolean setPref: branch: user pref: browser.translations.enable fullPageTranslationAutomaticPopup: description: Controls whether the popup automatically shows for translations. owner: gtatum@mozilla.com hasExposure: false variables: boolean: description: Set to true to automatically popup, and false to only show the button. type: boolean setPref: branch: user pref: browser.translations.automaticallyPopup pdfjs: description: The Firefox pdf reader. owner: pdfjs-team@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent each time a pdf is displayed. variables: addHighlight: description: Set to true to highlight some text or something else in an existing pdf. type: boolean setPref: branch: default pref: pdfjs.enableHighlightEditor addAnImageInPDF: description: Add an image in an existing pdf. owner: cdenizet@mozilla.com hasExposure: false variables: boolean: description: Set to true to enable the add-an-image feature type: boolean setPref: branch: default pref: pdfjs.enableStampEditor # fxms-message-* placeholder feature ids # # https://docs.google.com/spreadsheets/d/119YbeKStLL0Fg2QkK-yN93mrtD1rlneGZGTl_jAwtyw/edit#gid=1903378504 # has info on using these placeholder feature ids, as well as (very short) instructions on # checking to see if we need more (which we do once per Nightly) and how to add them. # # Instructions for adding a new fxms-message-* placeholder feature id # 1) clone an existing one here # 2) update the YAML feature id to the next unused number # 3) update the YAML description # 4) add the new feature id to MESSAGING_EXPERIMENTS_DEFAULT_FEATURES list in MessagingExperimentConstants.sys.mjs # 5) add the new feature id and the version it landed to the spreadsheet tab linked to above fxms-message-1: description: "A Firefox Messaging System message" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-2: description: "Firefox Messaging System message 2" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-3: description: "Firefox Messaging System message 3" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-4: description: "Firefox Messaging System message 4" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-5: description: "Firefox Messaging System message 5" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-6: description: "Firefox Messaging System message 6" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-7: description: "Firefox Messaging System message 7" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-8: description: "Firefox Messaging System message 8" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-9: description: "Firefox Messaging System message 9" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-10: description: "Firefox Messaging System message 10" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} fxms-message-11: description: "Firefox Messaging System message 11" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} whatsNewPage: description: "A Firefox Messaging System message for the What's new page channel" owner: omc@mozilla.com hasExposure: true exposureDescription: >- "Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched." variables: overrideUrl: description: URL of the What's new page type: string setPref: branch: user pref: startup.homepage_override_url_nimbus maxVersion: description: Maximum Firefox update version type: string setPref: branch: user pref: startup.homepage_override_nimbus_maxVersion pbNewtab: description: "A Firefox Messaging System message for the pbNewtab message channel" owner: omc@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched. schema: uri: "chrome://browser/content/asrouter/schemas/MessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/MessagingExperiment.schema.json" variables: {} backgroundTaskMessage: description: "A Firefox Messaging System message for the background task message channel" owner: nalexander@mozilla.com applications: - firefox-desktop-background-task hasExposure: true exposureDescription: >- Exposure is sent if the message is about to be shown after trigger and targeting conditions on the message matched. schema: uri: "chrome://browser/content/asrouter/schemas/BackgroundTaskMessagingExperiment.schema.json" path: "browser/components/asrouter/content-src/schemas/BackgroundTaskMessagingExperiment.schema.json" variables: {} backgroundUpdateAutomaticRestart: description: "Whether to automatically restart when the background update task could make more progress." owner: nalexander@mozilla.com applications: - firefox-desktop-background-task hasExposure: false variables: enabled: type: boolean fallbackPref: app.update.background.automaticRestartEnabled description: >- When true, make the background update task restart when the final update state is `READY_FOR_RESTART`. Generally, this will finish applying a staged update, completing the update earlier than it otherwise would have been completed. pictureinpicture: description: Message for first time Picture-in-Picture users owner: nbaumgardner@mozilla.com hasExposure: true exposureDescription: Exposure is sent when a user hovers over a video and Picture-in-Picture has not been used before variables: title: type: string description: The title to be used for the PiP toggle message: type: string description: The message to be used in the PiP toggle showIconOnly: type: boolean description: Whether to show the first time PiP toggle or show the PiP icon only oldToggle: type: boolean description: Whether to show the control style (true) or variant style (false) for the first time PiP toggle displayDuration: type: int description: Duration of PiP first time toggle display in days before switching to PiP icon toggle glean: description: "The Glean data-control-plane feature within Firefox Desktop for controlling metric configuration" owner: glean-team@mozilla.com hasExposure: false variables: newtabPingEnabled: type: "boolean" fallbackPref: "browser.newtabpage.ping.enabled" description: "Whether to submit the 'newtab' ping" gleanMetricConfiguration: type: json description: | A map of metric base-identifiers to booleans representing the state of the 'enabled' flag for that metric. This variable is intended for interacting with the Glean data-control-plane via the Server Knobs functionality to remotely configure metrics to be enabled or disabled. gleanInternalSdk: description: "The Glean internal SDK feature intended only for internal Glean Team use" owner: glean-team@mozilla.com hasExposure: false # Some variables are used through the C++ API and thus require pref-storage. # We rely on those values at Glean.init time, which happens at startup. isEarlyStartup: true variables: finalInactive: type: "boolean" description: "Enables FOG early shutdown pings when true" gleanMetricConfiguration: type: json description: | A map of metric base-identifiers to booleans representing the state of the 'enabled' flag for that metric. This is not for public use! For data-control-plane use, please refer to the Glean documentation and use the `gleanMetricConfiguration` found in the `glean` feature for this. gleanMaxPingsPerMinute: type: int description: >- Maximum number of pings that can be sent in a 60 second interval majorRelease2022: description: Major Release 2022 owner: firefoxview@mozilla.com hasExposure: false isEarlyStartup: true variables: feltPrivacyPBMDarkTheme: type: boolean fallbackPref: "browser.theme.dark-private-windows" description: "Use dark theme variant for PBM windows. This is only supported if the theme sets darkTheme data." feltPrivacyShowPreferencesSection: type: boolean fallbackPref: "browser.privacySegmentation.preferences.show" description: "Controls visibility of the privacy segmentation preferences section." feltPrivacyWindowSeparation: type: boolean fallbackPref: "browser.privateWindowSeparation.enabled" description: "Whether or not private browsing windows use a separate icon in the Windows taskbar" colorwayCloset: type: boolean fallbackPref: "browser.theme.colorway-closet" description: "Whether or not to show the colorway closet modal" onboarding: type: boolean fallbackPref: "browser.majorrelease.onboarding" description: "Whether or not to use the MR2022 onboarding settings." browserLowMemoryPrefs: description: Prefs which control the browser's behaviour under low memory. owner: haftandilian@mozilla.com hasExposure: false variables: lowMemoryResponseMask: description: Control the response on macOS when under memory pressure. type: int setPref: branch: default pref: "browser.lowMemoryResponseMask" lowMemoryResponseOnWarn: description: Controls which macOS memory-pressure levels trigger the browser low memory response. type: boolean setPref: branch: default pref: "browser.lowMemoryResponseOnWarn" tabsUnloadOnLowMemory: description: Whether to unload tabs when available memory is running low. type: boolean setPref: branch: default pref: "browser.tabs.unloadOnLowMemory" scriptLoaderPrefs: description: Prefs that control the script loader. owner: npierron@mozilla.com hasExposure: false variables: delazificationStrategy: description: >- Selects which parsing/delazification strategy should be used while parsing scripts off-main-thread. See DelazificationOption in CompileOptions.h for values. type: int setPref: branch: default pref: "dom.script_loader.delazification.strategy" echPrefs: description: Prefs that control Encrypted Client Hello. owner: djackson@mozilla.com hasExposure: false variables: tlsEnabled: description: Whether to enable ECH for connections using TLS type: boolean setPref: branch: default pref: "network.dns.echconfig.enabled" h3Enabled: description: Whether to enable ECH for connections using H3/QUIC type: boolean setPref: branch: default pref: "network.dns.http3_echconfig.enabled" forceWaitHttpsRR: description: Whether to force waiting for HTTPS DNS records, which ECH requires. type: boolean setPref: branch: default pref: "network.dns.force_waiting_https_rr" insecureFallback: description: Whether to fallback to non-ECH connections if all ECH RRs fail. type: boolean setPref: branch: default pref: "network.dns.echconfig.fallback_to_origin_when_all_failed" tlsGreaseProb: description: Probability of GREASEing a TLS connection with ECH (0-100). type: int setPref: branch: default pref: "security.tls.ech.grease_probability" h3GreaseEnabled: description: Whether to apply GREASE settings to H3/QUIC connections. type: boolean setPref: branch: default pref: "security.tls.ech.grease_http3" disableGreaseOnFallback: description: Whether to disable GREASE when retrying a connection. type: boolean setPref: branch: default pref: "security.tls.ech.disable_grease_on_fallback" greasePaddingSize: description: Assumed echConfig padding length for GREASE extensions (1-255). type: int setPref: branch: default pref: "security.tls.ech.grease_size" dohPrefs: description: Prefs that control DNS over HTTPS. owner: vgosu@mozilla.com hasExposure: false variables: trrMode: description: Has a value of 2 for TRR first, 3 for TRR only, 0 for off. type: int setPref: branch: default pref: "network.trr.mode" trrUri: description: The URL of the DNS over HTTPS endpoint type: string setPref: branch: default pref: "network.trr.uri" dohMode: description: Same as trrMode, but set by the DoHController module. type: int setPref: branch: default pref: "doh-rollout.mode" dohUri: description: Same as trrUri, but set by the DoHController module. type: string setPref: branch: default pref: "doh-rollout.uri" enableFallbackWarningPage: description: Whether DoH fallback warning page will be displayed when DoH doesn't work in TRR first mode. type: boolean setPref: branch: default pref: "network.trr.display_fallback_warning" showFallbackCheckbox: description: Whether the checkbox to enable the fallback warning page is displayed in the settings UI. type: boolean setPref: branch: default pref: "network.trr_ui.show_fallback_warning_option" nativeHTTPSRecords: description: Whether we can perform native DNS HTTPS lookups type: boolean setPref: branch: default pref: "network.dns.native_https_query" dooh: description: "DNS over Oblivious HTTP" owner: vgosu@mozilla.com hasExposure: false variables: ohttpEnabled: description: Whether to use Oblivious HTTP for the resolution type: boolean setPref: branch: default pref: "network.trr.use_ohttp" ohttpRelayUri: description: The URL of the Oblivious HTTP relay type: string setPref: branch: default pref: "network.trr.ohttp.relay_uri" ohttpConfigUri: description: The URL used to fetch the configuration of the Oblivious HTTP gateway type: string setPref: branch: default pref: "network.trr.ohttp.config_uri" ohttpUri: description: The URL of the Oblivious DNS over HTTPS target resource type: string setPref: branch: default pref: "network.trr.ohttp.uri" networking: description: "Firefox Networking (Necko)" owner: vgosu@mozilla.com hasExposure: false variables: ehPreloadEnabled: description: Whether Early Hints preload is enabled type: boolean setPref: branch: default pref: "network.early-hints.enabled" ehPreconnectEnabled: description: Whether Early Hints preconnect is enabled type: boolean setPref: branch: default pref: "network.early-hints.preconnect.enabled" dnsMaxPriorityThreads: description: The maximum number of high priority DNS threads that can be created. type: int setPref: branch: default pref: "network.dns.max_high_priority_threads" dnsMaxAnyPriorityThreads: description: The maximum number of DNS threads that can be created to handle any priority DNS requests. type: int setPref: branch: default pref: "network.dns.max_any_priority_threads" preconnect: description: Whether the rel=preconnect feature is enabled type: boolean setPref: branch: default pref: "network.preconnect" networkPredictor: description: Whether the Necko predictor is enabled type: boolean setPref: branch: default pref: "network.predictor.enabled" http3CCalgorithm: description: The congestion control algorithm with which to configure neqo. 0 for NewReno, 1 for Cubic type: int setPref: branch: default pref: "network.http.http3.cc_algorithm" sendOnDataFinished: description: Whether we can send OnDataFinished in the content process type: boolean setPref: branch: default pref: "network.send_OnDataFinished" sendOnDataFinshedFromInputStreamPump: description: Whether we can send OnDataFinished to the content process from InputStreamPump type: boolean setPref: branch: default pref: "network.send_OnDataFinished.nsInputStreamPump" sendOnDataFinishedToHtml5parser: description: Whether we can send OnDataFinished to the html5parser in content process type: boolean setPref: branch: default pref: "network.send_OnDataFinished.html5parser" sendOnDataFinishedToCssLoader: description: Whether we can send OnDataFinished to the cssLoader in content process type: boolean setPref: branch: default pref: "network.send_OnDataFinished.cssLoader" pingsender: description: "In-product usage of the pingsender telemetry reporter." owner: nalexander@mozilla.com hasExposure: false variables: backgroundTaskEnabled: type: "boolean" fallbackPref: "toolkit.telemetry.shutdownPingSender.backgroundtask.enabled" description: "Whether to use the `pingsender` background task to send shutdown telemetry" dapTelemetry: description: DAP Telemetry owner: simon@mozilla.com hasExposure: false isEarlyStartup: true # Data is sent on startup with a trigger in BrowserGlue.sys.mjs variables: enabled: type: boolean fallbackPref: toolkit.telemetry.dap_enabled description: Whether to automatically send DAP measurements. task1Enabled: type: boolean fallbackPref: toolkit.telemetry.dap_task1_enabled description: Whether to send fake measurements for task 1. task1TaskId: type: string fallbackPref: toolkit.telemetry.dap_task1_taskid description: The task ID to use for task 1 measurements. visitCountingEnabled: type: boolean fallbackPref: toolkit.telemetry.dap_visit_counting_enabled description: Whether to count visits to the provided list of URLs. visitCountingExperimentList: fallbackPref: toolkit.telemetry.dap_visit_counting_experiment_list type: json description: A list of experiments with URLs for which we want to count visits. etpLevel2PBMPref: description: The pref that controls the ETP level 2 list in the private browsing mode owner: tihuang@mozilla.com hasExposure: false variables: enabled: description: Whether to enable ETP level 2 list in the private browsing mode. type: boolean setPref: branch: default pref: "privacy.annotate_channels.strict_list.pbmode.enabled" fxaButtonVisibility: description: Prefs to control the visibility of the Firefox Accounts toolbar button when not signed in. owner: mconley@mozilla.com hasExposure: false variables: boolean: description: True if the Firefox Accounts toolbar button should be visible when not signed in. type: boolean setPref: branch: user pref: identity.fxaccounts.toolbar.defaultVisible pxiToolbarEnabled: description: >- True if we're enabling the PXI dropdown menu for the FxA toolbar button instead of taking the user straight to login type: boolean setPref: branch: user pref: identity.fxaccounts.toolbar.pxiToolbarEnabled monitorEnabled: description: >- Toggle the Monitor CTA type: boolean setPref: branch: user pref: identity.fxaccounts.toolbar.pxiToolbarEnabled.monitorEnabled relayEnabled: description: >- Toggle the Relay CTA type: boolean setPref: branch: user pref: identity.fxaccounts.toolbar.pxiToolbarEnabled.relayEnabled vpnEnabled: description: >- Toggle the VPN CTA type: boolean setPref: branch: user pref: identity.fxaccounts.toolbar.pxiToolbarEnabled.vpnEnabled legacyHeartbeat: description: Normandy Heartbeat exposed to Nimbus owner: barret@mozilla.com hasExposure: false schema: uri: "resource://normandy/schemas/LegacyHeartbeat.schema.json" path: "toolkit/components/normandy/schemas/LegacyHeartbeat.schema.json" variables: survey: type: json description: The Heartbeat survey parameters. queryStripping: description: Query parameter stripping anti-tracking feature. owner: pbz@mozilla.com hasExposure: false variables: enabledNormalBrowsing: type: boolean setPref: branch: default pref: privacy.query_stripping.enabled description: Enables / disables URL query string stripping in normal browsing mode. enabledPrivateBrowsing: type: boolean setPref: branch: default pref: privacy.query_stripping.enabled.pbmode description: Enables / disables URL query string stripping in private browsing mode. allowList: type: string setPref: branch: default pref: privacy.query_stripping.allow_list description: >- List of sites exempt from query stripping. This list will be merged with records coming from RemoteSettings. stripList: type: string setPref: branch: default pref: privacy.query_stripping.strip_list description: >- List of query params to be stripped from URIs. This list will be merged with records coming from RemoteSettings. fontvisibility: description: Control Font Visibility in PBM owner: tom@mozilla.com hasExposure: false variables: enabledETP: type: int setPref: branch: default pref: layout.css.font-visibility.trackingprotection description: Set the Font Visibility level when Enhanced Tracking Protection is enabled enabledStandard: type: int setPref: branch: default pref: layout.css.font-visibility.standard description: Set the Font Visibility level for normal browsing enabledPBM: type: int setPref: branch: default pref: layout.css.font-visibility.private description: Set the Font Visibility level for private browsing (will override ETP) fingerprintingProtection: description: Control Fingerprinting Protection owner: tihuang@mozilla.com hasExposure: false variables: enabledNormal: type: boolean setPref: branch: default pref: privacy.fingerprintingProtection description: Enables / disables fingerprinting protection in normal browsing mode. enabledPrivate: type: boolean setPref: branch: default pref: privacy.fingerprintingProtection.pbmode description: Enables / disables fingerprinting protection in private browsing mode. overrides: type: string setPref: branch: default pref: privacy.fingerprintingProtection.overrides description: >- The protection overrides to add or remove fingerprinting protection targets. Please check RFPTargets.inc for all supported targets. migrationWizard: description: Prefs to control the Migration Wizard UI. owner: mconley@mozilla.com hasExposure: false variables: showImportAll: description: True if the "Variant 2" of the Migration Wizard browser / profile selection UI should be used. This is only meaningful in the new Migration Wizard. type: boolean setPref: branch: user pref: browser.migrate.content-modal.import-all.enabled showPreferencesEntrypoint: description: True if an entrypoint to the migration wizard should be visible in about:preferences. type: boolean setPref: branch: user pref: browser.migrate.preferences-entrypoint.enabled aboutWelcomeBehavior: description: >- When migration is kicked off from about:welcome, there are a few different behaviors that we want to test, controlled by a preference that is instrumented for Nimbus. The pref has the following possible states: "autoclose": The user will be directed to the migration wizard in about:preferences, but once the wizard is dismissed, the tab will close. "embedded": The migration wizard is embedded in about:welcome. "standalone": The migration wizard will open in a new top-level content window. "default" / other The user will be directed to the migration wizard in about:preferences. The tab will not close once the user closes the wizard. type: string setPref: branch: user pref: browser.migrate.content-modal.about-welcome-behavior migrateExtensions: description: True if importing extensions is enabled. type: boolean setPref: branch: user pref: browser.migrate.chrome.extensions.enabled chromeCanRequestPermissions: description: >- True if Chrome-based browsers can request read permissions on platforms where the browser is restricted from reading the contents of a Chrome-based browser's user data directory. In practice, this is only relevant to the Linux platform when the browser is installed as a Snap package. type: boolean setPref: branch: user pref: browser.migrate.chrome.get_permissions.enabled mixedContentUpgrading: description: Prefs to control whether we upgrade mixed passive content (images, audio, video) from http to https owner: fbraun@mozilla.com hasExposure: false variables: enabled: description: True if the mixed content upgrading pref is enabled type: boolean setPref: branch: default pref: security.mixed_content.upgrade_display_content image: description: True if the mixed content upgrading is enabled for images type: boolean setPref: branch: default pref: security.mixed_content.upgrade_display_content.image audio: description: True if the mixed content upgrading is enabled for audio type: boolean setPref: branch: default pref: security.mixed_content.upgrade_display_content.audio video: description: True if the mixed content upgrading is enabled for videos type: boolean setPref: branch: default pref: security.mixed_content.upgrade_display_content.video gc: description: Prefs that control gc heuristics. owner: dpalmeiro@mozilla.com hasExposure: false variables: max_nursery_size: description: Set the maximum size of the GC nursery, in kb. type: int setPref: branch: user pref: "javascript.options.mem.nursery.max_kb" min_nursery_size: description: Set the minimum size of the GC nursery, in kb. type: int setPref: branch: user pref: "javascript.options.mem.nursery.min_kb" gc_allocation_threshold_mb: description: Lower limit for collecting a zone, in MB. type: int setPref: branch: user pref: "javascript.options.mem.gc_allocation_threshold_mb" gc_balanced_heap_limits: description: Whether balanced heap limits are enabled. type: boolean setPref: branch: user pref: "javascript.options.mem.gc_balanced_heap_limits" gc_compacting: description: Whether compacting GC is enabled. type: boolean setPref: branch: user pref: "javascript.options.mem.gc_compacting" gc_heap_growth_factor: description: Heap growth parameter for balanced heap limit calculation. type: int setPref: branch: user pref: "javascript.options.mem.gc_heap_growth_factor" gc_helper_thread_ratio: description: Number of threads to use for parallel GC work. type: int setPref: branch: user pref: "javascript.options.mem.gc_helper_thread_ratio" gc_high_frequency_large_heap_growth: description: Heap growth factor for large heaps in the high-frequency GC state. type: int setPref: branch: user pref: "javascript.options.mem.gc_high_frequency_large_heap_growth" gc_high_frequency_small_heap_growth: description: Heap growth factor for small heaps in the high-frequency GC state. type: int setPref: branch: user pref: "javascript.options.mem.gc_high_frequency_small_heap_growth" gc_high_frequency_time_limit_ms: description: GCs less than this far apart in milliseconds will be considered high-frequency GCs. type: int setPref: branch: user pref: "javascript.options.mem.gc_high_frequency_time_limit_ms" gc_incremental: description: Whether incremental GC is enabled. If not, GC will always run to completion. type: boolean setPref: branch: user pref: "javascript.options.mem.gc_incremental" incremental_weakmap: description: Enable incremental weakmap marking. type: boolean setPref: branch: user pref: "javascript.options.mem.incremental_weakmap" gc_incremental_slice_ms: description: Max milliseconds to spend in an incremental GC slice. type: int setPref: branch: user pref: "javascript.options.mem.gc_incremental_slice_ms" gc_large_heap_incremental_limit: description: Limit of how far over the incremental trigger threshold we allow the heap to grow before finishing a collection non-incrementally, for large heaps. type: int setPref: branch: user pref: "javascript.options.mem.gc_large_heap_incremental_limit" gc_large_heap_size_min_mb: description: Lower limit for classifying a heap as large, in MB. type: int setPref: branch: user pref: "javascript.options.mem.gc_large_heap_size_min_mb" gc_low_frequency_heap_growth: description: Heap growth factor for low frequency GCs. type: int setPref: branch: user pref: "javascript.options.mem.gc_low_frequency_heap_growth" gc_malloc_threshold_base_mb: description: Set the malloc threshold base value in MB. type: int setPref: branch: user pref: "javascript.options.mem.gc_malloc_threshold_base_mb" gc_max_empty_chunk_count: description: Do not keep more than this many unused chunks in the free chunk pool. type: int setPref: branch: user pref: "javascript.options.mem.gc_max_empty_chunk_count" gc_max_helper_threads: description: The maximum number of background threads to use for parallel GC work. type: int setPref: branch: user pref: "javascript.options.mem.gc_max_helper_threads" gc_min_empty_chunk_count: description: We try to keep at least this many unused chunks in the free chunk pool at all times, even after a shrinking GC. type: int setPref: branch: user pref: "javascript.options.mem.gc_min_empty_chunk_count" gc_parallel_marking: description: Enable parallel marking. type: boolean setPref: branch: user pref: "javascript.options.mem.gc_parallel_marking" gc_parallel_marking_threshold_mb: description: The heap size above which to use parallel marking. type: int setPref: branch: user pref: "javascript.options.mem.gc_parallel_marking_threshold_mb" gc_per_zone: description: Whether per-zone GC is enabled. If not, all zones are collected every time. type: boolean setPref: branch: user pref: "javascript.options.mem.gc_per_zone" gc_small_heap_incremental_limit: description: Limit of how far over the incremental trigger threshold we allow the heap to grow before finishing a collection non-incrementally, for small heaps. type: int setPref: branch: user pref: "javascript.options.mem.gc_small_heap_incremental_limit" gc_small_heap_size_max_mb: description: Upper limit for classifying a heap as small, in MB. type: int setPref: branch: user pref: "javascript.options.mem.gc_small_heap_size_max_mb" gc_urgent_threshold_mb: description: Set the urgent threshold, in MB. type: int setPref: branch: user pref: "javascript.options.mem.gc_urgent_threshold_mb" nursery_eager_collection_threshold_kb: description: Set the eager collection threshold, in kb, for the nursery. type: int setPref: branch: user pref: "javascript.options.mem.nursery_eager_collection_threshold_kb" nursery_eager_collection_threshold_percent: description: Set the eager collection percent threshold for the nursery. type: int setPref: branch: user pref: "javascript.options.mem.nursery_eager_collection_threshold_percent" nursery_eager_collection_timeout_ms: description: Set the eager collection timeout, in ms, for the nursery. type: int setPref: branch: user pref: "javascript.options.mem.nursery_eager_collection_timeout_ms" jsParallelParsing: description: Pref to toggle JS parallel parsing. owner: dpalmeiro@mozilla.com, nbp@mozilla.com hasExposure: false variables: enabled: description: True to enable parallel parsing. type: boolean setPref: branch: user pref: "javascript.options.parallel_parsing" jitThresholds: description: Prefs that control jit tier thresholds. owner: dpalmeiro@mozilla.com, jdemooij@mozilla.com hasExposure: false variables: blinterp_threshold: description: Set the threshold to enable blinterp compilation. type: int setPref: branch: user pref: "javascript.options.blinterp.threshold" baseline_threshold: description: Set the threshold to enable baseline compilation. type: int setPref: branch: user pref: "javascript.options.baselinejit.threshold" ion_threshold: description: Set the threshold to enable ion compilation. type: int setPref: branch: user pref: "javascript.options.ion.threshold" ion_bailout_threshold: description: Set the ion frequent bailout threshold. type: int setPref: branch: user pref: "javascript.options.ion.frequent_bailout_threshold" ion_offthread_compilation: description: True to enable offthread ion compilations. type: boolean setPref: branch: user pref: "javascript.options.ion.offthread_compilation" inlining_max_length: description: Set the max bytecode length considered for inlining. type: int setPref: branch: user pref: "javascript.options.inlining_bytecode_max_length" jitHintsCache: description: Pref to toggle the JIT hints cache. owner: dpalmeiro@mozilla.com hasExposure: false variables: enabled: description: True to enable the hints cache. type: boolean setPref: branch: user pref: "javascript.options.jithints" raceCacheWithNetwork: description: Prefs to toggle the race cache with network. owner: dpalmeiro@mozilla.com, acreskey@mozilla.com hasExposure: false variables: enabled: description: True to enable the rcwn feature. type: boolean setPref: branch: default pref: "network.http.rcwn.enabled" httpSpeculativeParallelLimit: description: Prefs to control the http speculative parallel limit. owner: dpalmeiro@mozilla.com, acreskey@mozilla.com hasExposure: false variables: speculative_parallel_limit: description: Maximum number of parallel speculative connections. type: int setPref: branch: default pref: "network.http.speculative-parallel-limit" shopping2023: description: Prefs to control the 2023 shopping experiment. owner: jhirsch@mozilla.com hasExposure: true exposureDescription: >- The timing of the exposure event depends on the experiment, but generally the event is recorded when the user first encounters onboarding UI for the shopping feature. variables: enabled: description: True if the experience is enabled (experimental treatment group) type: boolean fallbackPref: browser.shopping.experience2023.enabled control: description: True if the experiment is enabled but experience is disabled (experimental control group) type: boolean fallbackPref: browser.shopping.experience2023.control adsEnabled: description: True if showing recommended products is enabled type: boolean setPref: branch: default pref: browser.shopping.experience2023.ads.enabled adsExposure: description: True if we want to record ad inventory for opted-in users, even if ads are disabled type: boolean setPref: branch: default pref: browser.shopping.experience2023.ads.exposure surveyEnabled: description: True if showing survey is enabled type: boolean fallbackPref: browser.shopping.experience2023.survey.enabled autoOpenEnabled: description: True if auto-open behavior for the sidebar is enabled type: boolean setPref: branch: default pref: browser.shopping.experience2023.autoOpen.enabled shoppingOHTTP: description: Prefs to control the OHTTP URLs used for shopping. owner: gijs@mozilla.com hasExposure: false variables: ohttpRelayURL: description: What OHTTP relay URL to use type: string setPref: branch: default pref: toolkit.shopping.ohttpRelayURL ohttpConfigURL: description: URL for the OHTTP config to use type: string setPref: branch: default pref: toolkit.shopping.ohttpConfigURL opaqueResponseBlocking: description: Prefs to enable Opaque Response Blocking owner: farre@mozilla.com hasExposure: true exposureDescription: Exposure is sent when a response is blocked variables: enabled: description: Whether ORB is enabled type: boolean setPref: branch: user pref: "browser.opaqueResponseBlocking" javascriptValidator: description: Whether JavaScript validation for ORB is enabled type: boolean setPref: branch: user pref: "browser.opaqueResponseBlocking.javascriptValidator" filterFetchResponse: description: Whether filtering of internal responses in the parent ORB is enabled type: int setPref: branch: user pref: "browser.opaqueResponseBlocking.filterFetchResponse" mediaExceptionsStrategy: description: >- If we partially or wholly allow audio and video MIME types in conflict with spec. type: int setPref: branch: user pref: "browser.opaqueResponseBlocking.mediaExceptionsStrategy" updatePrompt: description: Prefs to control content and behavior of update notifications owner: omc@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent at most once per browsing session when an update notification prompt is displayed. variables: showReleaseNotesLink: type: boolean description: >- If true, the "Learn More" link will be shown in the update prompt. If false or omitted, the link will only be shown for supported locales. releaseNotesURL: type: string fallbackPref: app.releaseNotesURL.prompt description: >- Template for the URL opened when the user clicks the "Learn More" link in the update prompt. If an empty string, the link will not be shown. powerSaver: description: Prefs to control power saving behaviors owner: florian@mozilla.com hasExposure: false variables: reduceFrameRates: type: int setPref: branch: user pref: "gfx.display.max-frame-rate" description: >- Limit the number of frames displayed per second. If omitted, the refresh rate of the screen will be used. mediaAutoPlay: type: int setPref: branch: user pref: "media.autoplay.default" description: >- Control if media is allowed to auto-play, with and without sound. backgroundTimerMinTime: type: int setPref: branch: user pref: "dom.min_background_timeout_value" description: >- Limit how frequently timers are allowed to run in background tabs. backgroundTimerRegenerationRate: type: int setPref: branch: user pref: "dom.timeout.background_budget_regeneration_rate" description: >- Limit how quickly the background tab timer budget regenerates. backgroundUpdate: description: Prefs to control aspects of the background update process. owner: install-update@mozilla.com hasExposure: true exposureDescription: >- The exposure event is sent when scheduling the background task and both the feature is enabled and the service registry key (Mozilla Maintenance Service) is *not* available for this installation. That is the first time the feature can impact Firefox behaviour and the user experience. variables: enableUpdatesForUnelevatedInstallations: description: >- Allow the background update process to download and apply updates when the Mozilla Maintenance Service is unavailable but the installation directory can be written. type: boolean setPref: branch: user pref: app.update.background.allowUpdatesForUnelevatedInstallations defaultAgent: description: >- Features that configure the Windows Default Browser Agent. owner: install-update@mozilla.com applications: - firefox-desktop-background-task hasExposure: false variables: cppFallback: description: >- Triggers the Default Agent to fall back to the C++ implementation of DoTask if true. type: boolean fallbackPref: "defaultAgent.cppFallback.enabled" bookmarks: description: Prefs to control aspects of the bookmarks system. owner: omc@mozilla.com hasExposure: false variables: enableBookmarksToolbar: type: string setPref: branch: user pref: browser.toolbars.bookmarks.visibility description: If the bookmarks toolbar should never, always, or only show on newtab. cookieBannerHandling: description: Automatically handle cookie banners on the user's behalf. owner: pbz@mozilla.com hasExposure: false variables: modeNormalBrowsing: type: int setPref: branch: default pref: cookiebanners.service.mode description: >- Controls the cookie banner handling mode in normal browsing. Values: 0 - disabled, 1 - reject all, 2 - reject all with accept all fallback. modePrivateBrowsing: type: int setPref: branch: default pref: cookiebanners.service.mode.privateBrowsing description: >- Controls the cookie banner handling mode in private browsing. Values: 0 - disabled, 1 - reject all, 2 - reject all with accept all fallback. enableGlobalRules: type: boolean setPref: branch: default pref: cookiebanners.service.enableGlobalRules description: >- Enables use of global CookieBannerRules, which apply to all sites. This enables handling of CMPs across sites without the use of site-specific rules. enableGlobalRulesSubFrames: type: boolean setPref: branch: default pref: cookiebanners.service.enableGlobalRules.subFrames description: >- 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. enableDetectOnly: type: boolean setPref: branch: default pref: cookiebanners.service.detectOnly description: >- When set to true, cookie banners are detected and detection events are dispatched, but they will not be handled. This pref applies to both normal and private browsing windows. enableFirefoxDesktopUI: type: boolean setPref: branch: default pref: cookiebanners.ui.desktop.enabled description: Enables the cookie banner desktop UI. enablePromo: type: boolean setPref: branch: default pref: browser.promo.cookiebanners.enabled description: Enables the cookie banner promo in about:privatebrowsing. enableDesktopFeatureCallout: type: boolean setPref: branch: default pref: cookiebanners.ui.desktop.showCallout description: Enables the cookie banner feature callout on desktop. backgroundThreads: description: Prefs to control MacOS thread priorities for power savings. owner: kwright@mozilla.com hasExposure: false variables: use_low_power: description: >- Use the MacOS QoS libraries to deprioritize select threads. type: boolean setPref: branch: user pref: threads.use_low_power.enabled lower_mainthread_priority_in_background: description: >- When a browsing context is put in the background and isn't actively playing media, deprioritize its main thread. type: boolean setPref: branch: user pref: threads.lower_mainthread_priority_in_background.enabled reportBrokenSite: description: The Report Broken Site feature owner: twisniewski@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: ui.new-webcompat-reporter.enabled description: >- Whether Report Broken Site is enabled sendMoreInfo: type: boolean setPref: branch: user pref: ui.new-webcompat-reporter.send-more-info-link description: >- Whether Report Broken Site shows the send more info link directing users to webcompat.com (defaults to true for prerelease channels) reasonDropdown: type: int setPref: branch: user pref: ui.new-webcompat-reporter.reason-dropdown description: >- 0 = do not show the "reason" dropdown 1 = show an optional "reason" dropdown 2 = show a required "reason" dropdown feltPrivacy: description: Prefs for Felt Privacy v1 experiments owner: cmeador@mozilla.com hasExposure: true exposureDescription: Exposure when user opens a private browsing window. variables: feltPrivacy: type: boolean setPref: branch: default pref: browser.privatebrowsing.felt-privacy-v1 description: >- When true, new styles and copy enabled on about:privatebrowsing. When true, a toggle for showing or hiding quick suggestions appears in about:preferences. resetPBMAction: type: boolean setPref: branch: default pref: browser.privatebrowsing.resetPBM.enabled description: >- Enables the reset PBM feature button and confirmation panel. phc: description: Prefs to control the Probabalistic Heap Checker (PHC) owner: pbone@mozilla.com hasExposure: false variables: phcEnabled: description: Whether to enable PHC type: boolean setPref: branch: user pref: memory.phc.enabled phcMinRamMB: description: The minimum amount of RAM required to enable PHC type: int setPref: branch: user pref: memory.phc.min_ram_mb phcAvgDelayFirst: description: The delay before the first PHC allocation type: int setPref: branch: user pref: memory.phc.avg_delay.first phcAvgDelayNormal: description: The delay between PHC allocations type: int setPref: branch: user pref: memory.phc.avg_delay.normal phcAvgDelayPageReuse: description: The delay before reusing a PHC page type: int setPref: branch: user pref: memory.phc.avg_delay.page_reuse mailto: description: Prefs to control aspects of the mailto handler owner: install-update@mozilla.com hasExposure: true exposureDescription: >- The exposure event is sent when a webmail site calls the registerProtocolHandler function and when users use mailto links in Firefox. variables: dualPrompt: type: boolean description: >- Can be used to toggle the entire feature on and off. fallbackPref: browser.mailto.dualPrompt dualPrompt.os: type: boolean description: >- Make webmail sites display prompts to set Firefox as default OS mailto application and another prompt to set the current site as default webmail site in Firefox. fallbackPref: browser.mailto.dualPrompt.os nimbusIsReady: description: A feature that provides the number of Nimbus is_ready events to send when Nimbus is ready. owner: chumphreys@mozilla.com hasExposure: false applications: - firefox-desktop variables: eventCount: description: The number of events that should be sent. type: int nimbusTelemetry: description: A feature that enables or disables Nimbus telemetry. owner: chumphreys@mozilla.com hasExposure: false applications: - firefox-desktop variables: gleanMetricConfiguration: description: A Glean metric configuration JSON blob. type: json httpsFirst: description: >- Prefs for HTTPS-First, which upgrades all top-level page loads to HTTPS and provides a automatic fallback to HTTP if the site isn't available via HTTPS. owner: mjurgens@mozilla.com, seceng-telemetry@mozilla.com hasExposure: false variables: enabled: description: Enable HTTPS-First type: boolean setPref: branch: default pref: dom.security.https_first enabledPbm: description: Enable HTTPS-First in private browsing only type: boolean setPref: branch: default pref: dom.security.https_first_pbm enabledSchemeless: description: >- Enables schemeless HTTPS-First, which will only apply HTTPS-First to address bar inputs without a scheme. This essentially makes HTTPS the default scheme in the address bar, while providing a fallback to HTTP. type: boolean setPref: branch: default pref: dom.security.https_first_schemeless backgroundTimerMs: description: >- After a request gets upgraded to HTTPS, specifies the time after which a second HTTP request is fired to check if the site is available via HTTPS, but timing out via HTTPS. This also applies to HTTPS-Only, not just HTTPS-First. type: int setPref: branch: default pref: dom.security.https_only_fire_http_request_background_timer_ms contentRelevancy: description: >- A feature for interest-based content relevance ranking and personalization for Firefox. owner: disco-team@mozilla.com hasExposure: false variables: enabled: description: Enable this feature type: boolean fallbackPref: toolkit.contentRelevancy.enabled maxInputUrls: description: The maximum number of input URLs for interest classification type: int minInputUrls: description: The minimal number of input URLs for interest classification type: int timerInterval: description: >- The interval (in seconds) of the background update timer for the content relevancy manager type: int setPref: branch: user pref: toolkit.contentRelevancy.timerInterval tabPreview: description: Prefs to control Tab Previews owner: dwalker@mozilla.com hasExposure: false variables: tabPreviewsEnabled: type: boolean setPref: branch: default pref: browser.tabs.cardPreview.enabled description: >- When true, users will see the new card preview when hovering a tab, instead of the standard tooltip backupService: description: Prefs to control the profile backup service owner: mconley@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: default pref: browser.backup.enabled description: >- When true, the profile backup service will be initialized soon after startup. pqcrypto: description: Prefs that control the use of post-quantum cryptography. owner: jschanck@mozilla.com hasExposure: false variables: tlsEnableXyber: type: boolean setPref: branch: default pref: security.tls.enable_kyber description: >- Whether to enable Xyber768 for TLS.