# 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: beth@mozilla.com applications: - firefox-desktop - firefox-desktop-background-task hasExposure: false allowCoenrollment: true variables: {} testFeature: description: Test only feature owner: beth@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: beth@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: beth@mozilla.com hasExposure: false variables: value: type: string setPref: branch: user pref: nimbus.qa.pref-2 description: The value to set for the pref. # Note: this feature is not for general use. If you want to run an experiment # that sets prefs, you *must* register your feature in this manifest and specify # the prefs you will control. prefFlips: description: Flip arbitrary prefs. Controlled by release management. owner: beth@mozilla.com hasExposure: false allowCoenrollment: true variables: prefs: type: json description: "The prefs to set." schema: uri: resource://nimbus/schemas/PrefFlipsFeature.schema.json path: toolkit/components/nimbus/schemas/PrefFlipsFeature.schema.json search: description: Search service related features. owner: search-and-suggest-program@mozilla.com hasExposure: false variables: scotchBonnetEnableOverride: type: boolean setPref: branch: default pref: browser.urlbar.scotchBonnet.enableOverride description: >- Whether or not enabling scotch bonnet feature. If this variable is true, the following features are available as default. * Unified search button * Secondary action buttons * Search term persistence * Intuitive search keywords * HTTP swap 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. targetExperiment: type: string description: >- Recorded in SERP telemetry, this is the slug of the experiment someone is requesting enrollment and branch information for. (Note that the featureId needs to be set to "search".) searchConfiguration: description: >- Search experimentation support for the engine configuration. Some of these options may cause an additional reload to occur during the startup phase. owner: search-and-suggest-program@mozilla.com hasExposure: false variables: experiment: type: string setPref: branch: user pref: browser.search.experiment description: >- Used to activate only matching configurations that contain the value in `experiment` 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: "params": [ { "name": "channel", "experimentConfig": "google_channel_row" } ], 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. If the parameter is in the search configuration, but there is no experiment, or the experiment does not set a value, then the parameter will not be included in the search url. Only the search team can update the configuration. separatePrivateDefaultUIEnabled: type: boolean setPref: branch: user pref: browser.search.separatePrivateDefault.ui.enabled description: Whether the UI for the separate private default feature is enabled. separatePrivateDefaultUrlbarResultEnabled: type: boolean setPref: branch: user pref: browser.search.separatePrivateDefault.urlbarResult.enabled 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: actionsOnboardingTimesToShow: type: int fallbackPref: browser.urlbar.quickactions.timesToShowOnboardingLabel description: >- The number of times a user should be shown the actions onboarding label. 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. ampMatchingStrategy: type: int fallbackPref: browser.urlbar.quicksuggest.ampMatchingStrategy description: >- The matching strategy for AMP suggestions. Leave undefined or set to zero to use the usual default exact-keyword strategy. Otherwise set to an integer value defined on `AmpMatchingStrategy` in `RustSuggest.sys.mjs` (corresponding to the `AmpMatchingStrategy` enum in the Rust component coerced to a 1-based integer value). 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. deduplicationEnabled: type: boolean setPref: pref: browser.urlbar.deduplication.enabled branch: user description: >- Feature gate that controls whether result deduplication in the urlbar is enabled. fakespotFeatureGate: type: boolean fallbackPref: browser.urlbar.fakespot.featureGate description: >- Feature gate that controls whether all aspects of the Fakespot suggestion feature are exposed to the user. fakespotMinKeywordLength: type: int description: >- The minimum prefix length of a Fakespot keyword the user must type to trigger the suggestion. fakespotShowLessFrequentlyCap: type: int fallbackPref: browser.urlbar.fakespot.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 Fakespot suggestions. If undefined or zero, the user will be able to click the command without any limit. fakespotSuggestedIndex: type: int fallbackPref: browser.urlbar.fakespot.suggestedIndex description: >- The index of Fakespot results within the Firefox Suggest section. A negative index is relative to the end of the section. keywordExposureResults: type: string setPref: pref: browser.urlbar.keywordExposureResults branch: user description: >- Comma-separated list of result types that should trigger keyword-exposure telemetry. Keyword exposures can be recorded along with result exposures. To enable keyword exposures for a result type, you must add it both to this variable and to `exposureResults`. The only exception is the "rust_exposure" result type, which can be added to this variable even if it's not in `exposureResults` since it's enabled by setting the `quickSuggestExposureSuggestionTypes` variable. Keyword exposures are recorded in the `urlbar-keyword-exposure` ping. See that ping's description for more. 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: pref: browser.urlbar.exposureResults branch: user description: >- Comma-separated list of result types that should trigger exposure telemetry, which is recorded in the `exposure` event. By default exposure results are visible like usual, but they can be hidden by setting the `showExposureResults` variable to false. To also record keyword exposures for a result type, include it in the `keywordExposureResults` variable as well. showExposureResults: type: boolean setPref: pref: browser.urlbar.showExposureResults branch: user 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. quickSuggestAmpTopPickCharThreshold: type: int fallbackPref: browser.urlbar.quicksuggest.ampTopPickCharThreshold description: >- Character-count threshold (inclusive) for showing AMP suggestions as top picks. If an AMP suggestion is triggered by a keyword at least this many characters long, it will be shown as a top pick. When this variable is set, full keywords will also show AMP suggestions as top picks even if they have fewer characters than this threshold. quickSuggestContextualOptInEnabled: type: boolean setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn description: Whether the Firefox Suggest contextual opt-in result is enabled. quickSuggestContextualOptInFirstReshowAfterPeriodDays: type: int setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn.firstReshowAfterPeriodDays description: Period until reshow the Firefox Suggest contextual opt-in result when first dismissed. quickSuggestContextualOptInSecondReshowAfterPeriodDays: type: int setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn.secondReshowAfterPeriodDays description: Period until reshow the Firefox Suggest contextual opt-in result when second dismissed. quickSuggestContextualOptInThirdReshowAfterPeriodDays: type: int setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn.thirdReshowAfterPeriodDays description: Period until reshow the Firefox Suggest contextual opt-in result when third dismissed. quickSuggestContextualOptInImpressionLimit: type: int setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn.impressionLimit description: Limit for impression to dismiss the Firefox Suggest contextual opt-in result. quickSuggestContextualOptInImpressionDaysLimit: type: int setPref: branch: default pref: browser.urlbar.quicksuggest.contextualOptIn.impressionDaysLimit description: Days until dismiss the Firefox Suggest contextual opt-in result after first impression. 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. quickSuggestDynamicSuggestionTypes: type: string setPref: pref: browser.urlbar.quicksuggest.dynamicSuggestionTypes branch: user description: >- Comma-separated list of Suggest dynamic suggestion types to enable. Set this variable to the `suggestion_type` defined in the remote settings record that contains your suggestions. If you want to enable multiple suggestion types, separate them with commas. One particular intended use of this variable is to deliver hidden-exposure suggestions for testing potential exposures. Hidden-exposure suggestions trigger exposure telemetry based on a set of keywords you provide but they are never visible. If you are testing multiple types of hidden-exposure suggestions, consider using one experiment branch per type, especially if you are also enabling keyword exposures. Exposure suggestions are recorded in telemetry with the "rust_exposure" result type. It's not necessary to include "rust_exposure" in `exposureResults`. Unless you are testing other results in the same experiment branch, it's also not necessary to set `showExposureResults: false`. To also record keyword exposures, include "rust_exposure" in `keywordExposureResults`. 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. quickSuggestMlEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.mlEnabled description: >- Whether Suggest will use the ML backend in addition to Rust. 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 quickSuggestRankingMode: type: string fallbackPref: browser.urlbar.quicksuggest.rankingMode description: >- Specify the ranking mode for QuickSuggest. - "default": ranking by static scores specified by individual providers. - "interest": ranking by relevance scores provided by `ContentRelevancyManager`. - "random": ranking by randomly selecting a winner out of candidates. Note that this ranking mode can still be overridden by `quickSuggestScoreMap`. If the ranking mode is unspecified or set to any unknown values, it will default to the static score based ranking. enum: - default - interest - random 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` quickSuggestSettingsUi: type: int fallbackPref: browser.urlbar.quicksuggest.settingsUi description: >- When Suggest is enabled, this determines the Suggest settings that will be visible in the settings UI (about:preferences). When Suggest is disabled, this is ignored and Suggest settings are hidden. Possible values: 0: (default) Full, all settings will be shown. 1: None, no settings will be shown. 2: Offline only, settings that pertain to online will be hidden. 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 Firefox Suggest results within the Firefox Suggest section when "Show search suggestions ahead of browsing history in address bar results" is checked. When not checked, the index is hardcoded as -1. Negative indexes are relative to the end of the section. 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. semanticHistoryEnable: type: boolean setPref: branch: user pref: places.semanticHistory.featureGate description: use semanticHistory Search feature. semanticHistoryCompletionThreshold: type: string setPref: branch: user pref: places.semanticHistory.completionThreshold description: >- Fraction (0.0 – 1.0) of top Places rows that must have embeddings before semantic-history search is enabled. 0.5 = 50 %. semanticHistoryDistanceThreshold: type: string setPref: branch: user pref: places.semanticHistory.distanceThreshold description: >- semantic similarity distance threshold (0.0 - 1.0) defaulted at 0.75. suggestSemanticHistoryMinLength: type: int setPref: branch: user pref: browser.urlbar.suggest.semanticHistory.minLength description: >- Minimum length of search query when history semantic search will be enabled. suggestCalculator: type: boolean setPref: branch: user pref: browser.urlbar.suggest.calculator description: >- Whether or not to show calculator results when a user types a valid calculation string into 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. 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. weatherShowLessFrequentlyCap: 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 weather suggestions. If undefined or zero, the user will be able to click the command without any limit. weatherUiTreatment: type: int fallbackPref: browser.urlbar.weather.uiTreatment description: >- The UI treatment to use for weather suggestions. Possible values: 0: (default) Simplest UI with current temperature and location 1: Simpler UI, adds current conditions, high/low, and URL 2: Full UI, adds forecast yelpMinKeywordLength: type: int description: >- The minimum prefix length of a Yelp keyword the user must type to trigger the suggestion. yelpMlEnabled: type: boolean fallbackPref: browser.urlbar.yelp.mlEnabled description: >- Whether Yelp suggestions will be served from the Suggest ML backend instead of Rust. 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. yelpServiceResultDistinction: type: boolean fallbackPref: browser.urlbar.yelp.serviceResultDistinction description: >- Whether to distinguish service type subjects. If true, we show special titile for the suggestion. 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 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" pagesMaxVisitGap: description: >- The maximum allowed time (in seconds) between when a visit was recorded and when an interaction occurs for them to be paired. This accounts for slight discrepancies in their timestamps. type: int setPref: branch: user pref: "places.frecency.pages.alternative.interactions.maxVisitGapSeconds" pagesViewTimeSeconds: description: >- The minimum allowed time (in seconds) a page was viewed before upgrading the score of a visit. type: int setPref: branch: user pref: "places.frecency.pages.alternative.interactions.viewTimeSeconds" pageViewTimeIfManyKeypressesSeconds: description: >- The minimum allowed time (in seconds) a page was viewed before checking the manyKeypresses threshold. type: int setPref: branch: user pref: "places.frecency.pages.alternative.interactions.viewTimeIfManyKeypressesSeconds" manyKeypresses: description: >- The minimum number of keypresses typed before upgrading the score of a visit. type: int setPref: branch: user pref: "places.frecency.pages.alternative.interactions.manyKeypresses" pagesVeryHighWeight: description: >- The weight to use for the very high importance bucket. type: int setPref: branch: user pref: "places.frecency.pages.alternative.veryHighWeight" 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 backdrop: type: string fallbackPref: browser.aboutwelcome.backdrop description: >- Specify the color to be used to update the background color toolbarButtonEnabled: type: boolean setPref: branch: user pref: browser.aboutwelcome.toolbarButtonEnabled description: >- Should the return to about:welcome toolbar button be shown preonboarding: description: "A modal that shows on first startup, typically on top of about:welcome" owner: omc@mozilla.com # Exposure is recorded by the spotlight feature used to show the modal hasExposure: false # Needed at `sessionstore-windows-restored`. isEarlyStartup: true variables: enabled: type: boolean fallbackPref: browser.preonboarding.enabled description: >- Should users see the preonboarding modal? screens: type: json fallbackPref: browser.preonboarding.screens description: Content to show in the onboarding flow requireAction: type: boolean fallbackPref: browser.preonboarding.requireAction description: >- When showModal is enabled, should action be required to proceed (show as a window modal with dismiss using the ESC key disabled)? currentPolicyVersion: type: int fallbackPref: datareporting.policy.currentPolicyVersion description: >- The current policy version displayed by this preonboarding modal. minimumPolicyVersion: type: int fallbackPref: datareporting.policy.minimumPolicyVersion description: >- The minimum policy version which the user must have accepted to not see the preonboarding modal. firstRunURL: type: string fallbackPref: datareporting.policy.firstRunURL description: >- URL of browser tab to be opened on first run instead of infobar. 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. firefoxBridge: description: "Controls for Firefox Bridge extension and extension registration" owner: install-update@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: default pref: browser.firefoxbridge.enabled description: >- Should Firefox Bridge be registered within firefoxBridgeNativeMessaging startup idle task for use with native messaging proxy. abouthomecache: description: "The startup about:home cache." owner: omc@mozilla.com, mconley@mozilla.com hasExposure: false variables: enabled: type: boolean description: Is the feature enabled? setPref: branch: user pref: browser.startup.homepage.abouthome_cache.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 newtabMobileDownloadPromotion: description: Cross-sell promotion to download Firefox for mobile owner: mcrawford@mozilla.com hasExposure: false variables: showModal: type: boolean description: Display mobile download modal to users until dismissed setPref: branch: user pref: browser.newtabpage.activity-stream.mobileDownloadModal.enabled variantA: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.mobileDownloadModal.variant-a description: >- Variant A modal message and QR code. variantB: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.mobileDownloadModal.variant-b description: >- Variant B modal message and QR code. variantC: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.mobileDownloadModal.variant-c description: >- Variant C modal message and QR code. newtabUnifiedAds: description: Mozilla Ad Routing Service (MARS) unified ads service owner: mcrawford@mozilla.com, sdowne@mozilla.com hasExposure: false variables: unifiedAdsEndpoint: description: The URL for the MARS API endpoint. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.unifiedAds.endpoint unifiedAdsSpocsEnabled: type: boolean description: >- Enable MARS endpoint to serve ads for recommended stories setPref: branch: user pref: browser.newtabpage.activity-stream.unifiedAds.spocs.enabled unifiedAdsTilesEnabled: type: boolean description: >- Enable MARS endpoint to serve content for top sites tiles setPref: branch: user pref: browser.newtabpage.activity-stream.unifiedAds.tiles.enabled unifiedAdsFeedEnabled: type: boolean description: >- Enable AdsFeed to manage all ads request/serving logic setPref: branch: user pref: browser.newtabpage.activity-stream.unifiedAds.adsFeed.enabled unifiedAdsFeedTilesEnabled: type: boolean description: >- Enable AdsFeed to query MARS server to fetch/serve top sites tiles setPref: branch: user pref: browser.newtabpage.activity-stream.unifiedAds.adsFeed.tiles.enabled newtabSpocsCache: description: The about:newtab sponsored content cache. owner: sdowne@mozilla.com hasExposure: false variables: spocsCacheTimeout: type: int setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.spocs.cacheTimeout description: >- Set sponsored content cache timeout in minutes. spocsStartupCache: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.spocs.startupCache.enabled description: >- Controls if spocs should be included in startup cache. newtabAdSizingExperiment: description: >- Change the default ad size and UI for certain ad formats. owner: achurchwell@mozilla.com, sdowne@mozilla.com, mcrawford@mozilla.com hasExposure: false variables: leaderboard: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabAdSize.leaderboard description: >- Leaderboard ad size and UI. leaderboard_position: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.newtabAdSize.leaderboard.position description: >- Leaderboard row position. billboard: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabAdSize.billboard description: >- Billboard ad size and UI. billboard_position: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.newtabAdSize.billboard.position description: >- Billboard row position. medium_rectangle: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabAdSize.mediumRectangle description: >- Medium rectangle (MREC) ad size and UI. newtabInlineTopicSelection: description: >- Adds Inline topic selection to sections layout owner: nbarrett@mozilla.com hasExposure: false variables: TopicSelectionEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.interestPicker.enabled description: >- Enables inline topic selection newtabLayoutExperiment: description: >- Change the default layout of new tab by adjusting sizes and spacing of elements. owner: achurchwell@mozilla.com, sdowne@mozilla.com hasExposure: false variables: variantA: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabLayouts.variant-a description: >- Variant A in layouts experiment. variantB: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabLayouts.variant-b description: >- Variant B in layouts experiment. newtabCustomWallpaper: description: >- Modify the wallpaper selection feature to support user-uploaded custom wallpaper images owner: mcrawford@mozilla.com hasExposure: false variables: uploadWallpaper: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.customWallpaper.enabled description: >- Turns on and off ability to upload a custom wallpaper. colorPicker: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.customColor.enabled description: >- Turns on and off background color picker. maxFileSizeEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.customWallpaper.fileSize.enabled description: >- Turns on and off maximum file size for uploaded images maxFileSize: type: int setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.customWallpaper.fileSize description: >- Maximum file size (in MB) a user can upload newtabShortcutsExperiment: description: >- Adjusting sizes and spacing of new tab shortcuts. owner: sdowne@mozilla.com hasExposure: false variables: refresh: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabShortcuts.refresh description: >- Adjusting sizes and spacing of new tab shortcuts. newtabSponsoredContent: description: >- Change and control the sponsored content on newtab. owner: sdowne@mozilla.com hasExposure: false variables: spocPositions: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.spoc-positions description: CSV string of spoc position indexes on newtab Pocket grid spocPlacements: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.placements.spocs description: CSV string of spoc placement ids on newtab Pocket grid. A placement id tells our ad server where the ads are intended to be displayed. spocCounts: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.placements.spocs.counts description: CSV string of spoc placement counts on newtab Pocket grid. The count tells the ad server how many ads to return for this position and placement. tilesPlacements: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.placements.tiles description: CSV string of tiles placement ids on newtab tiles section. A placement id tells our ad server where the ads are intended to be displayed. tilesCounts: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.placements.tiles.counts description: CSV string of tiles placement counts on newtab tiles section. The count tells the ad server how many ads to return for this position and placement. newtabGroupedSponsoredControls: description: >- Adjust sponsored content controls on newtab. owner: mcrawford@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.system.showSponsoredCheckboxes description: >- When true, checkboxes for sponsored results in top sites and recommended stories are grouped separately on about:preferences#home newtabTopicSelection: description: the about:newtab topic selection experience. owner: nbarrett@mozilla.com hasExposure: false variables: availableTopics: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.topicSelection.topics description: >- List of available topics to select for topic selection suggestedTopics: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.topicSelection.suggestedTopics description: >- List of pre-selected topics to display on first run of topic selection modal topicSelectionOnboarding: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.topicSelection.onboarding.enabled description: >- Turns on and off topic selection onbaording regionTopicsConfig: description: A comma-separated list of regions that get topics selection by default. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.topicSelection.region-topics-config localeTopicsConfig: description: A comma-separated list of locales that get topics selection by default. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.topicSelection.locale-topics-config regionTopicLabelConfig: description: A comma-separated list of regions that get topic labels by default. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.topicLabels.region-topic-label-config localeTopicLabelConfig: description: A comma-separated list of locales that get topic Labels by default. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.topicLabels.locale-topic-label-config newtabContextualContent: description: about:newtab contextual content feed owner: nbarrett@mozilla.com hasExposure: false variables: contextualContentEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.contextualContent.enabled description: >- Override the contextual content enabled value set via region/locale localeContextualContentConfig: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.contextualContent.locale-content-config description: >- A comma-separated list of locales that get contextual content by default. regionContextualContentConfig: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.contextualContent.region-content-config description: >- A comma-separated list of regions that get contextual content by default. contextualContentFeeds: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.contextualContent.feeds description: >- CSV list of possible feeds for the contextual content feed contextualContentSelectedFeed: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.contextualContent.selectedFeed description: >- currently selected feed to display in the Contextual Content component newtabAdsReporting: description: about:newtab reporting ads feature owner: rhamoui@mozilla.com hasExposure: false variables: reportAdsEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.reportAds.enabled description: >- Enable reporting for ads newTabSectionsExperiment: description: about:newtab section UI update owner: nbarrett@mozilla.com, mcrawford@mozilla.com hasExposure: false variables: sectionsEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.enabled description: >- Enable the Section UI for recommended stories on newtab cardRefreshThumbsUpDownEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.cards.thumbsUpDown.enabled description: >- Enable the thumbs up/down buttons in the revised pocket story card UI in recommended stories on newtab cardRefreshEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.cards.enabled description: >- Enable the revised pocket story card UI in recommended stories on newtab regionPersonalizationInferredConfig: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.personalization.inferred.region-config description: >- A comma-separated list of regions that use inferred personalization. localePersonalizationInferredConfig: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.personalization.inferred.locale-config description: >- A comma-separated list of locales that use inferred personalization. personalizationInferredEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.personalization.inferred.enabled description: >- Enable the inferred personalization for topics localeSectionstConfig: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.locale-content-config description: >- A comma-separated list of locales that get contextual content by default. regionSectionsConfig: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.region-content-config description: >- A comma-separated list of regions that get contextual content by default. sectionsPersonalization: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.personalization.enabled description: >- Enable personalized sections layout. Allow users to follow/unfollow topic sections. sectionsCustomizeMenuPanel: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.customizeMenuPanel.enabled description: >- Enable personalized sections menu panel. Allow users to follow/unfollow topic sections. sectionsContextualAdsEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.contextualAds.enabled description: >- Enable contextual ads in sections. regionSectionsContextualAdsConfig: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.contextualAds.region-config description: >- A comma-separated list of regions that get contextual ads by default. localeSectionsContextualAdsConfig: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.sections.contextualAds.locale-config description: >- A comma-separated list of locales that get contextual ads by default. contextualSpocPlacements: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.placements.contextualSpocs description: CSV string of spoc placement ids on newtab Pocket grid. A placement id tells our ad server where the ads are intended to be displayed. contextualSpocCounts: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.placements.contextualSpocs.counts description: CSV string of spoc placement counts on newtab Pocket grid. The count tells the ad server how many ads to return for this position and placement. newtabPrivatePing: description: The newtab-content ping, sent through OHTTP owner: nbarrett@mozilla.com hasExposure: false variables: privatePingEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.telemetry.privatePing.enabled description: >- Enables the private newtab-content ping sent through OHTTP redactNewtabPing: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.telemetry.privatePing.redactNewtabPing.enabled description: >- Provides an option to redact content ids of users from click, impression and related events in the NewTab ping. Should be enabled when data colection has shefted to the more private NewTab_content ping. includeInferredInterests: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.telemetry.privatePing.inferred.enabled description: >- Includes a differentially private intrest vector of general topical interests based on New Tab clicks. Only sent when user has enabled personalization. maxSubmissionDelayMs: type: int setPref: branch: user pref: browser.newtabpage.activity-stream.telemetry.privatePing.maxSubmissionDelayMs description: >- The maximum range for the random delay from scheduling the newtab-content ping to actually sending it. The minimum is 1000 by default. This is in milliseconds. newtabTrainhop: description: Experiment feature for the train-hopping newtab extension. owner: mconley@mozilla.com hasExposure: false allowCoenrollment: true variables: type: type: string description: A discriminant to tell different kinds of trainhop experiments apart. payload: type: json description: The experiment configuration. newtabMerinoOhttp: description: Sending request to merino over OHTTP in newtab owner: nbarrett@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystrean.merino-provider.ohttp.enabled description: >- Enables using OHTTP for merino content requests newtabMarsOhttp: description: Sending request to MARS over OHTTP in newtab owner: nbarrett@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.unifiedAds.ohttp.enabled description: >- Enables using OHTTP for unified ads API requests newtabRefinedCardsLayout: description: Enable layout and styling refinements for content and ad cards across different card sizes owner: rhamoui@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.refinedCardsLayout.enabled description: Enables the refined cards layout for newtab pocketNewtab: description: The Pocket section in newtab owner: sdowne@mozilla.com hasExposure: false isEarlyStartup: true variables: 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. wallpapersHighlightEnabled: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.highlightEnabled description: >- Turns on and off wallpaper feature highlight. wallpaperHighlightHeaderText: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.highlightHeaderText description: >- Changes the wallpaper feature highlight header wallpaperHighlightContentText: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.highlightContentText description: >- Changes the wallpaper feature highlight content wallpaperHighlightCtaText: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.highlightCtaText description: >- Changes the wallpaper feature highlight cta currentWallpaper: type: string setPref: branch: user pref: browser.newtabpage.activity-stream.newtabWallpapers.wallpaper description: >- Changes the currently selected wallpaper weatherLocationSearch: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.weather.locationSearchEnabled description: >- Turns on and off location search for newtab weather widget 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. 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. merinoProviderEnabled: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.merino-provider.enabled description: Sets the recommendations provider service to Merino. merinoProviderEndpoint: type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.merino-provider.endpoint description: Merino endpoint to use for recommendations. 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 regionWeatherConfig: description: A comma-separated list of regions that get weather by default. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.region-weather-config localeWeatherConfig: description: A comma-separated list of locales that weather widget supports. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.locale-weather-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 pocketFeedParameters: type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.pocket-feed-parameters description: >- Add parameters to Pocket feed URL. merinoFeedExperiment: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.merino-feed-experiment description: >- Should we pass the experiment branch and slug to the Merino feed request. thumbsUpDown: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.enabled description: Display thumbs up and down buttons on recommended stories regionThumbsUpDownConfig: description: A comma-separated list of regions that get thumbs up and down buttons by default. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.region-thumbs-config description: Display thumbs up and down buttons on recommended stories localeThumbsUpDownConfig: description: A comma-separated list of locales that get thumbs up and down buttons by default. type: string setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.locale-thumbs-config thumbsUpDownCompactLayout: type: boolean setPref: branch: user pref: browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.searchTopsitesCompact description: >- Change the layout of the sections to be more compact to account for the added card height with the thumbs up/down enabled. saveToPocket: description: The save to Pocket feature owner: sdowne@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: extensions.pocket.enabled description: Enabled save to Pocket feature. 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? # Experiment for different Relay UI treatments. Variations at: # https://www.figma.com/design/gnyElr1Wtce3RdQT54y8kS/Relay-%26-Firefox-Integration?node-id=316-2024&node-type=canvas&t=A3iAuevSTtwXeFxb-0 email-autocomplete-relay: description: Relay UI for email fields. exposureDescription: Exposure is sent each time a user sees the Relay autocomplete dropdown item hasExposure: true owner: lcrouch@mozilla.com variables: firstOfferVersion: type: string description: Which Relay UI treatment to show fallbackPref: signon.firefoxRelay.firstOfferVersionFallback showToAllBrowsers: type: boolean setPref: branch: user pref: signon.firefoxRelay.showToAllBrowsers description: Whether to show Relay to Firefox users who are NOT signed into FXA. # 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: true exposureDescription: "Exposure is sent when an address is autofilled." variables: status: type: boolean setPref: branch: default pref: extensions.formautofill.addresses.experiments.enabled description: If true, we will allow user to use address autofill creditcards-autofill-enabled: description: Credit card autofill is enabled in all regions owner: issozi@mozilla.com hasExposure: false variables: creditcardsSupported: description: Enable credit card autofill in all regions type: string setPref: branch: default pref: extensions.formautofill.creditCards.supported shellService: description: "Interface with OS, e.g., pinning and set default" owner: desktop-integrations@mozilla.com hasExposure: false variables: disablePin: type: boolean description: Disable pin to taskbar feature disableStartMenuPin: type: boolean setPref: branch: user pref: browser.shell.disableStartMenuPin description: Disable pin to start menu feature setDefaultBrowserUserChoice: type: boolean setPref: branch: user pref: browser.shell.setDefaultBrowserUserChoice description: Should it set as default browser setDefaultBrowserUserChoiceRegRename: type: boolean setPref: branch: user pref: browser.shell.setDefaultBrowserUserChoice.regRename description: When setting default via UserChoice, rename the underlying registry key to prevent kennel driver registry locking. 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. setDefaultGuidanceNotifications: type: boolean fallbackPref: browser.shell.setDefaultGuidanceNotifications description: Whether or not the user should see the guidance notifications when setting Firefox as their default browser. 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 selectTranslation: description: This feature enables the option to translate selected text from the context menu. owner: enordin@mozilla.com hasExposure: false variables: enabled: description: Set to true to enable the select-translations feature type: boolean setPref: branch: user pref: browser.translations.select.enable pdfjs: description: The Firefox pdf reader. owner: pdfjs-team@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent each time a pdf is displayed. variables: enableAltText: description: Set to true to enable alt text generation. type: boolean setPref: branch: default pref: pdfjs.enableAltText enableUpdatedAddImage: description: Set to true to enable updated add image with alt text flow. type: boolean setPref: branch: default pref: pdfjs.enableUpdatedAddImage browserMlEnable: description: Set to true to enable local inference engine type: boolean setPref: branch: default pref: browser.ml.enable enableSignatureEditor: description: Set to true to enable the signature editor type: boolean setPref: branch: default pref: pdfjs.enableSignatureEditor # 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: {} fxms-message-12: description: "Firefox Messaging System message 12" 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-13: description: "Firefox Messaging System message 13" 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-14: description: "Firefox Messaging System message 14" 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-15: description: "Firefox Messaging System message 15" 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 minVersion: description: Minimum Firefox update version type: string setPref: branch: user pref: startup.homepage_override_nimbus_minVersion disableWNP: description: >- Block all What's New Pages. Used to compare no-WNP control branches to WNP treatment branches. type: boolean setPref: branch: user pref: startup.homepage_override_nimbus_disable_wnp 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 allowCoenrollment: true variables: 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 variables: finalInactive: type: "boolean" description: "Enables FOG early shutdown pings when true" setPref: branch: user pref: telemetry.glean.internal.finalInactive 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 setPref: branch: user pref: telemetry.glean.internal.maxPingsPerMinute 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" 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" dohProviderList: description: An override of the rollout provider-list json type: string setPref: branch: default pref: "doh-rollout.provider-list" dohProviderSteeringList: description: An override of the rollout steering provider-list json type: string setPref: branch: default pref: "doh-rollout.provider-steering.provider-list" 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: 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" enableOffMainThreadStreamDecompression: description: Whether to enable decompression of network streams off-main-thread type: boolean setPref: branch: default pref: "network.decompression_off_mainthread2" offMainThreadStreamDecompressionThreshold: description: Minimum content length for off-main-thread decompression type: int setPref: branch: default pref: "network.decompression_off_mainthread_min_size" dnsGracePeriod: description: The grace period allows the DNS cache to use expired entries, while kicking off a revalidation in the background. type: int setPref: branch: default pref: "network.dnsCacheExpirationGracePeriod" http3UseNSPRForIO: description: true by default using legacy UDP IO via NSPR. When set to false, uses new UDP IO via Fast UDP for Firefox project. type: boolean setPref: branch: default pref: "network.http.http3.use_nspr_for_io" networkingEarlyHints: description: "Networking (Necko) Early Hints" 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" networkingDNS: description: "Networking (Necko) DNS" owner: vgosu@mozilla.com hasExposure: false variables: 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" maxDnsCacheEntries: description: This is the number of dns cache entries allowed type: int setPref: branch: default pref: "network.dnsCacheEntries" networkingConnections: description: "Networking (Necko) Connections" owner: vgosu@mozilla.com hasExposure: false variables: httpMaxConnections: description: The maximum number of http connections. type: int setPref: branch: default pref: "network.http.max-connections" httpMaxPersistentConnectionsPerServer: description: The maximum number of persistent connections to a server type: int setPref: branch: default pref: "network.http.max-persistent-connections-per-server" speculativeConnectionLimit: description: The maximum number of half-open sockets allowed for speculative connections type: int setPref: branch: default pref: "network.http.speculative-parallel-limit" networkingSendOnDataFinished: description: "Networking (Necko) OnDataFinished" owner: vgosu@mozilla.com hasExposure: false variables: 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" networkingBannedPorts: description: "Networking (Necko) Banned Ports" owner: vgosu@mozilla.com hasExposure: false variables: bannedPortList: description: A comma-separated list of ports that Firefox will refuse to connect to. These ports will be appended to nsIOService gBadPortList type: string setPref: branch: default pref: "network.security.ports.banned" essentialFallbackDomains: description: "Whether to retry failing system requests with a backup domain" owner: vgosu@mozilla.com hasExposure: false variables: essentialDomainsEnabled: description: Whether to retry with a backup domain indicated in remote-settings type: boolean setPref: branch: default pref: "network.essential_domains_fallback" disableHttp3: description: "Whether HTTP/3 is disabled" owner: kershaw@mozilla.com hasExposure: false variables: withThirdPartyRoots: description: If third party roots are detected, disable HTTP/3 type: boolean setPref: branch: default pref: "network.http.http3.disable_when_third_party_roots_found" networkPrioritization: description: "Network request prioritization" owner: vgosu@mozilla.com hasExposure: false variables: priorityHeader: description: Whether to set the Priority header on each request. type: boolean setPref: branch: default pref: "network.http.priority_header.enabled" fetchPriority: description: Whether fetch priority is enabled type: boolean setPref: branch: default pref: "network.fetchpriority.enabled" h3FetchPriority: description: Whether to send HTTP3 priority frames type: boolean setPref: branch: default pref: "network.http.http3.priority" sendNoRFC7540Setting: description: Whether to send the SETTINGS_NO_RFC7540_PRIORITIES for the HTTP2 session. type: boolean setPref: branch: default pref: "network.http.http2.send_NO_RFC7540_PRI" h2deps: description: Whether RFC7540 priorities / stream dependencies are enabled type: boolean setPref: branch: default pref: "network.http.http2.enabled.deps" h3BackgroundTabDeprioritization: description: Lowers the priority when the tab is in the background. Potential privacy concerns. type: boolean setPref: branch: default pref: "network.http.http3.send_background_tabs_deprioritization" documentPriorityIncremental: description: Sets the incremental flag on the Priority header for document requests type: boolean setPref: branch: default pref: "dom.document_priority.incremental" imagePriorityIncremental: description: Sets the incremental flag on the Priority header for image requests type: boolean setPref: branch: default pref: "image.priority.incremental" imageAdjustLayoutPriority: description: Whether the network request priority should be adjusted according the layout and view frame position of each particular image. type: boolean setPref: branch: default pref: "image.layout_network_priority" adjustLinkPreloadScriptLow: description: Priority adjustment low for link-preload-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-script.low" adjustLinkPreloadScriptHigh: description: Priority adjustment high for link-preload-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-script.high" adjustLinkPreloadScriptAuto: description: Priority adjustment auto for link-preload-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-script.auto" adjustModuleScriptLow: description: Priority adjustment low for module-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.module-script.low" adjustModuleScriptHigh: description: Priority adjustment high for module-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.module-script.high" adjustModuleScriptAuto: description: Priority adjustment auto for module-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.module-script.auto" adjustAsyncOrDeferScriptLow: description: Priority adjustment low for async-or-defer-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.async-or-defer-script.low" adjustAsyncOrDeferScriptHigh: description: Priority adjustment high for async-or-defer-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.async-or-defer-script.high" adjustAsyncOrDeferScriptAuto: description: Priority adjustment auto for async-or-defer-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.async-or-defer-script.auto" adjustScriptInHeadLow: description: Priority adjustment low for script-in-head type: int setPref: branch: default pref: "network.fetchpriority.adjustments.script-in-head.low" adjustScriptInHeadHigh: description: Priority adjustment high for script-in-head type: int setPref: branch: default pref: "network.fetchpriority.adjustments.script-in-head.high" adjustScriptInHeadAuto: description: Priority adjustment auto for script-in-head type: int setPref: branch: default pref: "network.fetchpriority.adjustments.script-in-head.auto" adjustOtherScriptLow: description: Priority adjustment low for other-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.other-script.low" adjustOtherScriptHigh: description: Priority adjustment high for other-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.other-script.high" adjustOtherScriptAuto: description: Priority adjustment auto for other-script type: int setPref: branch: default pref: "network.fetchpriority.adjustments.other-script.auto" adjustLinkPreloadFontLow: description: Priority adjustment low for link-preload-font type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-font.low" adjustLinkPreloadFontHigh: description: Priority adjustment high for link-preload-font type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-font.high" adjustLinkPreloadFontAuto: description: Priority adjustment auto for link-preload-font type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-font.auto" adjustLinkPreloadFetchLow: description: Priority adjustment low for link-preload-fetch type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-fetch.low" adjustLinkPreloadFetchHigh: description: Priority adjustment high for link-preload-fetch type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-fetch.high" adjustLinkPreloadFetchAuto: description: Priority adjustment auto for link-preload-fetch type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-fetch.auto" adjustDeferredStyleLow: description: Priority adjustment low for deferred-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.deferred-style.low" adjustDeferredStyleHigh: description: Priority adjustment high for deferred-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.deferred-style.high" adjustDeferredStyleAuto: description: Priority adjustment auto for deferred-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.deferred-style.auto" adjustLinkPreloadStyleLow: description: Priority adjustment low for link-preload-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-style.low" adjustLinkPreloadStyleHigh: description: Priority adjustment high for link-preload-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-style.high" adjustLinkPreloadStyleAuto: description: Priority adjustment auto for link-preload-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.link-preload-style.auto" adjustNonDeferredStyleLow: description: Priority adjustment low for non-deferred-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.non-deferred-style.low" adjustNonDeferredStyleHigh: description: Priority adjustment high for non-deferred-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.non-deferred-style.high" adjustNonDeferredStyleAuto: description: Priority adjustment auto for non-deferred-style type: int setPref: branch: default pref: "network.fetchpriority.adjustments.non-deferred-style.auto" adjustGlobalFetchApiLow: description: Priority adjustment low for global-fetch-api type: int setPref: branch: default pref: "network.fetchpriority.adjustments.global-fetch-api.low" adjustGlobalFetchApiHigh: description: Priority adjustment high for global-fetch-api type: int setPref: branch: default pref: "network.fetchpriority.adjustments.global-fetch-api.high" adjustGlobalFetchApiAuto: description: Priority adjustment auto for global-fetch-api type: int setPref: branch: default pref: "network.fetchpriority.adjustments.global-fetch-api.auto" adjustImagesLow: description: Priority adjustment low for images type: int setPref: branch: default pref: "network.fetchpriority.adjustments.images.low" adjustImagesHigh: description: Priority adjustment high for images type: int setPref: branch: default pref: "network.fetchpriority.adjustments.images.high" adjustImagesAuto: description: Priority adjustment auto for images type: int setPref: branch: default pref: "network.fetchpriority.adjustments.images.auto" lowerTrackersPriority: description: Whether to lower priority of resources on the tracking protection list type: boolean setPref: branch: default pref: "privacy.trackingprotection.lower_network_priority" enableHttpTailing: description: Whether certain requests, mainly trackers, are put to the "tail", behind other requests type: boolean setPref: branch: default pref: "network.http.tailing.enabled" httpTailingUrgency: description: Priority urgency of tailed request type: int setPref: branch: default pref: "network.http.tailing.urgency" httpTailingDelayQuantum: description: When the page load has not yet reached DOMContentLoaded point, tail requestes are delayed by (non-tailed requests count + 1) * delay-quantum milliseconds. type: int setPref: branch: default pref: "network.http.tailing.delay-quantum" httpTailingDelayQuantumAfterDCL: description: After the page load reached DOMContentLoaded point, tail requestes are delayed by (non-tailed requests count + 1) * delay-quantum-after-domcontentloaded milliseconds. type: int setPref: branch: default pref: "network.http.tailing.delay-quantum-after-domcontentloaded" httpTailingMaxDelay: description: Upper limit for the calculated delay, prevents long standing and comet-like requests type: int setPref: branch: default pref: "network.http.tailing.delay-max" httpTailingTotalMaxDelay: description: Total limit we delay tailed requests since page load start type: int setPref: branch: default pref: "network.http.tailing.total-max" networkingAuth: description: "Firefox Networking (Necko) Authentication" owner: vgosu@mozilla.com hasExposure: false variables: redirectForAuthRetriesEnabled: description: Whether to enable redirects for auth retries type: boolean setPref: branch: default pref: "network.auth.use_redirect_for_retries" networkingDenyIpAddrAny: description: "Firefox Networking (Necko) Deny IP Address Any" owner: vgosu@mozilla.com hasExposure: false variables: denyIpAddrAny: description: Whether to deny empty (0.0.0.0) IP addresses type: boolean setPref: branch: default pref: "network.socket.ip_addr_any.disabled" cookieStore: description: Enablement of cookieStore API owner: edgul@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: default pref: dom.cookieStore.enabled description: >- Enablement of the cookie store API to CRUD and monitor cookies from window JS. managerEnabled: description: Enablement of ServiceWorker access to cookie-change events. type: boolean setPref: branch: default pref: dom.cookieStore.manager.enabled 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 variables: enabled: type: boolean description: Whether to automatically send DAP measurements. task1Enabled: type: boolean description: Whether to send fake measurements for task 1. task1TaskId: type: string description: The task ID to use for task 1 measurements. visitCountingEnabled: type: boolean description: Whether to count visits to the provided list of URLs. visitCountingExperimentList: type: json description: A list of experiments with URLs for which we want to count visits. dapAggregators: description: Aggregator server configuration to use for submitting DAP reports. owner: tcampbell@mozilla.com hasExposure: false variables: leader_url: description: The URL of the DAP Leader server where reports are submitted. type: string setPref: branch: default pref: "toolkit.telemetry.dap.leader.url" leader_hpke: description: The base64-encode HPKE key to encrypt leader shares with. type: string setPref: branch: default pref: "toolkit.telemetry.dap.leader.hpke" helper_url: description: The URL of the DAP Helper server. type: string setPref: branch: default pref: "toolkit.telemetry.dap.helper.url" helper_hpke: description: The base64-encode HPKE key to encrypt helper shares with. type: string setPref: branch: default pref: "toolkit.telemetry.dap.helper.hpke" 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" etpStrictFeatures: description: Prefs to control the strict ETP features owner: tihuang@mozilla.com hasExposure: false variables: features: description: The list of strict ETP features to enable in ETP strict mode. type: string setPref: branch: default pref: "browser.contentblocking.features.strict" thirdPartyCookieBlocking: description: Prefs to control third-party cookie blocking owner: tihuang@mozilla.com hasExposure: false variables: enabled: description: Whether to enable third-party cookie blocking type: boolean setPref: branch: default pref: "network.cookie.cookieBehavior.optInPartitioning" enabledPBM: description: Whether to enable third-party cookie blocking in private browsing mode type: boolean setPref: branch: default pref: "network.cookie.cookieBehavior.optInPartitioning.pbmode" thirdPartyTrackerCookieBlocking: description: Prefs to control third-party tracker cookie blocking owner: tihuang@mozilla.com hasExposure: false variables: enabled: description: Whether to enable third-party tracker cookie blocking. type: boolean setPref: branch: default pref: "network.cookie.cookieBehavior.trackerCookieBlocking" 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 avatarIconVariant: description: >- Controls the icon that appears in the toolbar button when in the signed-out state. One of the following values: - control - human-circle - fox-circle type: string fxaClientAssociation: description: Prefs to control the client association ping. owner: mconley@mozilla.com hasExposure: false variables: pingEnabled: description: >- True if the client association ping should be sent. type: boolean setPref: branch: user pref: identity.fxaccounts.telemetry.clientAssociationPing.enabled fxaAppMenuItem: description: >- Prefs to control the appearance and copy of the FxA sign-in button in the AppMenu when signed out. owner: mconley@mozilla.com hasExposure: true exposureDescription: >- Exposure is recorded when the user is enrolled in an experiment using this feature and the AppMenu on Firefox Desktop is opened. variables: ctaCopyVariant: description: >- One of the following values: - control - sync-devices - backup-data - backup-sync - mobile type: string fxaAvatarMenuItem: description: >- Prefs to control the appearance and copy of the FxA sign-in button in the FxA avatar menu when signed out. owner: mconley@mozilla.com hasExposure: true exposureDescription: >- Exposure is recorded when the user is enrolled in an experiment using this feature and the FxA avatar menu on Firefox Desktop is opened. variables: ctaCopyVariant: description: >- One of the following values: - control - sync-devices - backup-data - backup-sync - mobile type: string legacyHeartbeat: description: Normandy Heartbeat exposed to Nimbus owner: beth@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: emz@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. fdlibm_math: type: boolean setPref: branch: default pref: javascript.options.use_fdlibm_for_sin_cos_tan description: >- Uses a different math backend for Math.sin/cos/tan in JavaScript that exposes less entropy canvas_random_use_siphash: type: boolean setPref: branch: default pref: privacy.resistFingerprinting.randomization.canvas.use_siphash description: >- Uses the SipHash function for canvas randomization. enabledBaseline: type: boolean setPref: branch: default pref: privacy.baselineFingerprintingProtection description: Enables / disables baseline fingerprinting protection. overridesBaseline: type: string setPref: branch: default pref: privacy.baselineFingerprintingProtection.overrides description: >- The protection overrides to add or remove fingerprinting protection targets. Please check RFPTargets.inc for all supported targets. userCharacteristics: description: Control user characteristic data collection owner: tihuang@mozilla.com hasExposure: false variables: currentVersion: type: int setPref: branch: user pref: toolkit.telemetry.user_characteristics_ping.current_version description: The current collection version of the user characteristics. 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_generational: description: Whether generational GC is enabled. type: boolean setPref: branch: user pref: "javascript.options.mem.gc_generational" 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_max_parallel_marking_threads: description: The maximum number of threads to use for parallel marking, if enabled. type: int setPref: branch: user pref: "javascript.options.mem.gc_max_parallel_marking_threads" 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" nursery_max_time_goal_ms: description: Set the nursery's maximum time goal, in ms. type: int setPref: branch: user pref: "javascript.options.mem.nursery_max_time_goal_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" 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 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. showOtherBookmarks: type: boolean setPref: branch: user pref: browser.toolbars.bookmarks.showOtherBookmarks description: Display state of the "Other Bookmarks" toolbar button. cookieBannerHandling: description: Automatically handle cookie banners on the user's behalf. owner: emz@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.onLocationChange: type: boolean description: >- Display a reminder prompt for known webmailers if the prompt was not dismissed before the next visit of that webmailer. fallbackPref: browser.mailto.dualPrompt.onLocationChange dualPrompt.dismissXClickMinutes: type: int description: >- This pref controls after how many minutes the mailto prompt can be shown again, which has been dismissed by clicking the 'X' button before. fallbackPref: browser.mailto.dualPrompt.dismissXClickMinutes dualPrompt.dismissNotNowMinutes: type: int description: >- This pref controls after how many minutes the mailto prompt can be shown again, which has been dismissed by clicking a 'not now' button on it. fallbackPref: browser.mailto.dualPrompt.dismissNotNowMinutes 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: nimbus-team@mozilla.com hasExposure: false applications: - firefox-desktop variables: gleanMetricConfiguration: description: > A Glean metric configuration JSON blob. This is limited to configuring the following categories: - nimbus_events - nimbus_targeting_context - nimbus_targeting_environment type: json nimbusTargetingEnvironment: description: > Configuration for the nimbus_targeting_environment telemetry category. type: json schema: uri: resource://nimbus/schemas/NimbusTelemetryFeature.schema.json path: toolkit/components/nimbus/schemas/NimbusTelemetryFeature.schema.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 ingestEnabled: description: Enable the ingestion through the Rust component type: boolean fallbackPref: toolkit.contentRelevancy.ingestEnabled 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. prefsUIEnabled: type: boolean setPref: branch: default pref: browser.backup.preferences.ui.enabled description: >- When true, the section in about:preferences to control the backup feature is visible. sqlitePagesPerStep: description: >- The number of database pages to backup per step when backing up an SQLite database. type: int setPref: branch: user pref: browser.backup.sqlite.pages_per_step sqliteStepDelayMs: description: >- The delay between SQLite database backup steps in milliseconds. type: int setPref: branch: user pref: browser.backup.sqlite.step_delay_ms idleThresholdSeconds: description: >- The number of seconds of user idle time to wait for before considering to schedule a backup. type: int setPref: branch: user pref: browser.backup.scheduled.idle-threshold-seconds minTimeBetweenBackupsSeconds: description: >- The minimum number of seconds since the last known backup that must pass before we might schedule a backup. type: int setPref: branch: user pref: browser.backup.scheduled.minimum-time-between-backups-seconds pqcrypto: description: Prefs that control the use of post-quantum cryptography. owner: jschanck@mozilla.com hasExposure: false variables: tlsEnableMlkem: type: boolean setPref: branch: default pref: security.tls.enable_kyber description: >- Whether to enable mlkem768x25519 for TLS. h3EnableMlkem: type: boolean setPref: branch: default pref: network.http.http3.enable_kyber description: >- Whether to enable mlkem768x25519 for H3/QUIC. sendP256: type: boolean setPref: branch: default pref: security.tls.client_hello.send_p256_keyshare description: >- Whether to send a P256 share in the client hello in QUIC and TLS. dtlsWebRTCEnableMlkem: type: boolean setPref: branch: default pref: media.webrtc.enable_pq_dtls description: >- Whether to enable mlkem768x25519 for DTLS in WebRTC. dtlsWebRTC: description: Pref that controls the use of DTLS. owner: nkulatova@mozilla.com hasExposure: false variables: tlsVersionDTLS: type: int setPref: branch: default pref: media.peerconnection.dtls.version.max description: >- The maximum version of DTLS protocol used in WebRTC (770 = DTLS 1.0, 771 = DTLS 1.2, 772 = DTLS 1.3). certCompression: description: Prefs that control the use of certificate compression decoders. owner: anna.weine@mozilla.com hasExposure: false variables: tlsEnableZlib: type: boolean setPref: branch: default pref: security.tls.enable_certificate_compression_zlib description: >- Whether to enable Zlib for TLS certificate compression. tlsEnableBrotli: type: boolean setPref: branch: default pref: security.tls.enable_certificate_compression_brotli description: >- Whether to enable Brotli for TLS certificate compression. tlsEnableZstd: type: boolean setPref: branch: default pref: security.tls.enable_certificate_compression_zstd description: >- Whether to enable Zstd for TLS certificate compression. bounceTrackingProtection: description: Controls the Bounce Tracking Protection feature. owner: emz@mozilla.com isEarlyStartup: true hasExposure: true exposureDescription: >- Exposure is recored after every purge run which purged at least one tracker. Exposure is only recorded when the feature is fully enabled and not in dry-run mode. variables: mode: type: int setPref: branch: default pref: privacy.bounceTrackingProtection.mode description: >- Mode to run the feature in. See nsIBounceTrackingProtection.idl for documentation. requireStatefulBounces: type: boolean setPref: branch: default pref: privacy.bounceTrackingProtection.requireStatefulBounces description: >- If true, only bounce redirects where the middle hop/s access cookies or storage will be considered to be bounce trackers. If false, all redirects that fit the bounce tracker heuristic will be considered. remoteTabManagement: description: > Features that let users manage tabs on other devices that are connected to the same Mozilla account. owner: skhamis@mozilla.com hasExposure: false variables: closeTabsEnabled: description: >- When true, the user can close tabs on other devices connected to the same Mozilla account from the synced tabs menu. type: boolean fallbackPref: identity.fxaccounts.commands.remoteTabManagement.enabled crlite: description: Prefs that control the use of CRLite owner: jschanck@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: default pref: security.remote_settings.crlite_filters.enabled description: >- Whether CRLite artifacts will be downloaded. channel: type: string setPref: branch: default pref: security.pki.crlite_channel description: >- The channel from which CRLite artifacts will be downloaded. mode: type: int setPref: branch: default pref: security.pki.crlite_mode description: >- How CRLite results will be interpreted. timestamps_for_coverage: type: int setPref: branch: default pref: security.pki.crlite_timestamps_for_coverage description: >- How many covered timestamps do we need to see before we enforce a CRLite result. chatbot: description: AI chatbot feature configuration owner: elee@mozilla.com hasExposure: false variables: minVersion: type: string description: Minimum Firefox version to apply prefs prefs: type: json description: >- The prefs to set under browser.ml.chat.* with object keys as the sub-pref and values objects indicating the desired branch and value defaulting to clearing the user branch value. linkPreviews: description: Enabling the link previews feature owner: elee@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: browser.ml.linkPreview.enabled description: If true, will show previews when over link and keyboard shortcut is pressed prefs: type: json description: >- The prefs to set under browser.ml.linkPreview.* with object keys as the sub-pref and values objects indicating the desired branch and value defaulting to clearing the user branch value. sidebar: description: Sidebar feature configuration owner: elee@mozilla.com hasExposure: false variables: defaultLauncherVisible: type: boolean setPref: branch: user pref: sidebar.revamp.defaultLauncherVisible description: Change the initial visibleness of the sidebar launcher with horizontal tabs; true to make the launcher visible by default minVersion: type: string description: Minimum Firefox version to apply prefs revamp: type: boolean description: sidebar.revamp pref value to set on user branch; true for new experience verticalTabs: type: boolean description: sidebar.verticalTabs pref value to set on user branch; true to enable vertical tabs visibility: type: string description: sidebar.visibility pref value ("hide" or "always-show") to set on user branch fxms_bmb_button: description: A feature for the Firefox Messaging System Bookmarks Bar button surface 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: {} contentProcessSandbox: description: Prefs that control the content process sandbox. owner: bowen@mozilla.com hasExposure: false variables: Level: description: Content process sandbox level type: int setPref: branch: user pref: security.sandbox.content.level certificateTransparency: description: Certificate Transparency configuration owner: dkeeler@mozilla.com hasExposure: false variables: mode: type: int setPref: branch: default pref: security.pki.certificate_transparency.mode description: >- What mode Certificate Transparency is in (0=disable, 1=telemetry only, 2=enforce). setToDefaultPrompt: description: "Experimental set to default spotlight" 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: showSpotlightPrompt: description: Show experimental set to default spotlight message instead of default prompt type: boolean message: description: Message to show instead of the default prompt type: json tabGroups: description: Prefs to control Tab Groups owner: dao@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: browser.tabs.groups.enabled description: Controls whether users can create new tab groups via drag and drop or the tab context menu smartTabGroups: description: Prefs to control Smart Tab Groups owner: rrando@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: browser.tabs.groups.smart.enabled description: Controls whether users can use ml features for suggesting tab group names or similar tabs suggestOtherTabsMethod: type: string setPref: branch: user pref: browser.tabs.groups.smart.suggestOtherTabsMethod description: Controls clustering method used to suggest similar tabs feature topicModelRevision: type: string setPref: branch: user pref: browser.tabs.groups.smart.topicModelRevision description: Controls topic model version used by the feature embeddingModelRevision: type: string setPref: branch: user pref: browser.tabs.groups.smart.embeddingModelRevision description: Controls embedding model version used by the feature nearestNeighborThresholdInt: type: int setPref: branch: user pref: browser.tabs.groups.smart.nearestNeighborThresholdInt description: Controls the threshold, less than or equal to 1000, for the nearest neighbor cluster method smartblockEmbeds: description: Pref to control Smartblock Embeds owner: emz@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: default pref: extensions.webcompat.smartblockEmbeds.enabled description: >- Controls whether smartblock embed placeholders and protections panel toggles will be shown to the user. selectableProfiles: description: "Multiple profile management using selectableProfileService" owner: jhirsch@mozilla.com hasExposure: false variables: enabled: type: boolean description: Enables the multiple profiles feature when true. Turning off this variable will not disable the feature. storageAccessHeuristics: description: Heuristics that grant cookie access automatically for foreign resources owner: bvandersloot@mozilla.com hasExposure: false variables: popup_past_interaction: type: boolean setPref: branch: default pref: privacy.restrict3rdpartystorage.heuristic.window_open description: >- Do we grant cookie access to a third party when it is opened in a popup if it has been interacted with in the recent past? popup_interaction: type: boolean setPref: branch: default pref: privacy.restrict3rdpartystorage.heuristic.opened_window_after_interaction description: >- Do we grant cookie access to a third party when it is opened in a popup if it has the opener relationship and the user interacts with the popup? navigation: type: boolean setPref: branch: default pref: privacy.restrict3rdpartystorage.heuristic.navigation description: >- Do we grant cookie access to a third party when it is interacted with earlier in this tab's history, and the current first party is even further back in the history? redirect: type: boolean setPref: branch: default pref: privacy.restrict3rdpartystorage.heuristic.recently_visited description: >- Do we grant cookie access to a third party when it has been interacted with in the recent past, has been visited in the past few minutes, and redirects itself to another top level site? redirect_tracker: type: boolean setPref: branch: default pref: privacy.restrict3rdpartystorage.heuristic.redirect description: >- Do we grant cookie access to a tracker third party when it has been interacted with in the recent past and redirects itself to another top level site? partitioned-cookie-attribute: description: Control the enablment and migration of cookies to the Partitioned attribute, rather than TCP owner: bvandersloot@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: default pref: network.cookie.CHIPS.enabled description: >- Do we respect the Partitioned attribute? chipsMigrationTarget: description: What CHIPS migration count target the browser should reach. type: int setPref: branch: default pref: network.cookie.CHIPS.migrateDatabaseTarget chipsPartitionLimitEnabled: description: Whether we enforce CHIPS partition limit type: boolean setPref: branch: default pref: "network.cookie.chips.partitionLimitEnabled" chipsPartitionLimitDryRun: description: Whether we actually perform purging/rejection, used to report telemetry without webcompat issues type: boolean setPref: branch: default pref: "network.cookie.chips.partitionLimitDryRun" chipsPartitionLimitByteCapacity: description: The actual value of the CHIPS partition limit in bytes type: boolean setPref: branch: default pref: "network.cookie.chips.partitionLimitByteCapacity" auto-pip: description: "Automatic Picture-in-Picture" owner: mconley@mozilla.com hasExposure: false variables: enabled: type: boolean description: Whether or not to auto-open PiP when switching tabs. setPref: branch: user pref: "media.videocontrols.picture-in-picture.enable-when-switching-tabs.enabled" urlbar-ime-search: description: "Urlbar IME" owner: search-and-suggest-program@mozilla.com hasExposure: false variables: enabled: type: boolean description: Whether or not to keep the urlbar panel open during IME composition. setPref: branch: user pref: "browser.urlbar.keepPanelOpenDuringImeComposition" web-rtc-global-mute-toggles: description: "WebRTC Global Mute Toggles" owner: mconley@mozilla.com hasExposure: false variables: enabled: type: boolean description: Whether or not to enable global mute toggles to the WebRTC indicator. setPref: branch: user pref: "privacy.webrtc.globalMuteToggles" jpeg-xl: description: "JPEG-XL" owner: krosylight@mozilla.com hasExposure: false variables: enabled: type: boolean description: Whether or not to enable JPEG-XL support. setPref: branch: user pref: "image.jxl.enabled" css-masonry: description: "CSS Masonry Layout" owner: dholbert@mozilla.com hasExposure: false variables: enabled: type: boolean description: Whether or not to enable CSS masonry layout. setPref: branch: user pref: "layout.css.grid-template-masonry-value.enabled" contextual-password-manager: description: Enabling the contextual password manager feature owner: issozi@mozilla.com hasExposure: false variables: enabled: type: boolean setPref: branch: user pref: browser.contextual-password-manager.enabled description: If true, we will allow user to add the contextual password manager feature to the sidebar. h1-in-section-styles: description: "H1 in section user agent styles" owner: zcorpan@mozilla.com hasExposure: false variables: enabled: type: boolean description: Whether to enable H1 in section UA styles, see https://github.com/whatwg/html/issues/7867. setPref: branch: user pref: layout.css.h1-in-section-ua-styles.enabled windowsUIAutomation: description: Support for the Windows UI Automation API owner: jteh@mozilla.com hasExposure: false variables: enabled: type: int description: 0 to disable UIA, 2 to enable UIA. enum: - 0 - 2 setPref: branch: user pref: "accessibility.uia.enable" expandSignInButton: description: "Add text next to the FxA avatar toolbar icon" owner: skhamis@mozilla.com hasExposure: false variables: ctaCopyVariant: description: >- One of the following values: - fxa-avatar-sign-in - fxa-avatar-sign-up empty will be assumed default experience type: string contextID: description: >- Controls the behaviour of the context ID, which is a unique identifier used by Contextual Services. owner: mconley@mozilla.com hasExposure: false variables: rotationPeriodInDays: type: int setPref: branch: user pref: "browser.contextual-services.contextId.rotation-in-days" description: >- The number of days since the creation of the context ID after which the context ID should be regenerated. Set to 0 to disable rotation. This value only takes effect if rustBackendEnabled is also true, otherwise no rotation will occur regardless of the value. This setting will only be applied after the next restart. rustBackendEnabled: type: boolean setPref: branch: user pref: "browser.contextual-services.contextId.rust-component.enabled" description: >- Enables the Rust component backend for ContextId.sys.mjs, which is a prerequisite for doing rotations.