# 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/. # Features must be added here to be accessible through the NimbusFeature API. "no-feature-firefox-desktop": description: A dummy feature for experiments that target no feature. owner: barret@mozilla.com applications: - firefox-desktop - firefox-desktop-background-task hasExposure: false variables: {} testFeature: description: Test only feature owner: barret@mozilla.com applications: - firefox-desktop - firefox-desktop-background-task hasExposure: false isEarlyStartup: true variables: enabled: type: boolean description: Whether or not this feature is enabled testInt: type: int fallbackPref: nimbus.testing.testInt description: Int pref used by platform API tests testSetString: type: string setPref: nimbus.testing.testSetString description: A string pref set by Nimbus tests nimbus-qa-1: description: A feature for testing pref-setting on the default branch. owner: barret@mozilla.com hasExposure: false variables: value: type: string setPref: nimbus.qa.pref-1 description: The value to set for the pref. nimbus-qa-2: description: A feature for testing pref-setting on the user branch. owner: barret@mozilla.com isEarlyStartup: true hasExposure: false variables: value: type: string setPref: nimbus.qa.pref-2 description: The value to set for the pref. # `search` is for search engine experimentation features which do not require # isEarlyStartup to be set. search: description: Search engine experimentation support and testing features. owner: search-and-suggest-program@mozilla.com hasExposure: false variables: extraParams: type: json description: >- This allows extra parameters to be set for search engines requests including, where calls to the suggestions API, the search engine configuration defines those parameters. The use of this field should be coordinated with the Search team. The field value is an array of objects with key/value fields. For example: [ {"key": "google_channel_row", "value": "foo"} ] This is matched to a section in the search configuration: "extraParams": [ { "name": "channel", "pref": "google_channel_row", "condition": "pref" } ], In this case, the resulting URL for the appropriate search engine would have `&channel=foo` added to the URL when doing searches. If the key is not referenced in the search configuration, then no parameter will be added. Only the search team can update the configuration. cbhStudyUs: type: string setPref: browser.search.param.google_channel_us description: >- NOTE: Please use `extraParams` rather than this field. A string pref set by Nimbus tests for US search cohort cbhStudyRow: type: string setPref: browser.search.param.google_channel_row description: >- NOTE: Please use `extraParams` rather than this field. A string pref set by Nimbus tests for Rest of World (ROW) search cohort richSuggestionsFeatureGate: type: boolean setPref: browser.urlbar.richSuggestions.featureGate description: >- Feature gate that controls whether Rich Suggestions are enabled. serpEventTelemetryEnabled: type: boolean setPref: browser.search.serpEventTelemetry.enabled description: Whether the Glean SERP event telemetry is enabled. # `searchConfiguration` is for search experiment features for items that require # isEarlyStartup to be true. These items may require a reload of the search # engine configuration, and an additional reload may happen during the startup # process. searchConfiguration: description: Search experimentation support for the engine configuration owner: search-and-suggest-program@mozilla.com isEarlyStartup: true hasExposure: false variables: experiment: type: string fallbackPref: browser.search.experiment description: >- Used to activate only matching configurations that contain the value in `experiment` seperatePrivateDefaultUIEnabled: type: boolean description: Whether the UI for the separate private default feature is enabled. seperatePrivateDefaultUrlbarResultEnabled: type: boolean description: Whether the urlbar result for the separate private default is shown. urlbar: description: The Address Bar owner: search-and-suggest-program@mozilla.com hasExposure: true exposureDescription: >- The timing of the exposure event depends on the experiment, but generally the event is recorded once per app session when the user first encounters the UI of the experiment in which they're enrolled. variables: addonsFeatureGate: type: boolean fallbackPref: browser.urlbar.addons.featureGate description: >- Feature gate that controls whether all aspects of the addons suggestion feature are exposed to the user. addonsShowLessFrequentlyCap: type: int description: >- If defined and non-zero, this is the maximum number of times the user will be able to click the "Show less frequently" command for addon suggestions. If undefined or zero, the user will be able to click the command without any limit. addonsUITreatment: type: string enum: - a - b description: >- Define the UI type for addon suggestions. In case of "a", display rating stars and review volume on the bottom of the suggestion. In case of "b", display a label explaining that the addon suggestion is a recommendation. 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. bestMatchBlockingEnabled: type: boolean fallbackPref: browser.urlbar.bestMatch.blockingEnabled description: Whether best match Suggest suggestions can be blocked. bestMatchEnabled: type: boolean fallbackPref: browser.urlbar.bestMatch.enabled description: Gate for the best match feature. If false, the best match preferences UI and best match suggestions will not be shown. If true, the preferences UI will be shown, and the user can turn best match suggestions on or off. experimentType: type: string description: The type of the experiment (or rollout). If "best-match", then the Nimbus exposure event will be recorded when the user first triggers a best match (or would have triggered a best match, for users in the control group). If "modal", the event will be recorded when the user first triggers to show the onbording dialog. If empty, the event will be recorded when the user first triggers any type of Suggest suggestion. enum: - best-match - modal - "" isBestMatchExperiment: type: boolean description: >- Whether the experiment (or rollout) is related to best match. If true, then the Nimbus exposure event will be recorded when the user first triggers a best match (or would have triggered a best match, for users in the control group). Deprecated, please use `experimentType: "best-match"` instead. 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. merinoEnabled: type: boolean fallbackPref: browser.urlbar.merino.enabled description: Whether Merino is enabled as a quick suggest source merinoEndpointURL: type: string fallbackPref: browser.urlbar.merino.endpointURL description: The Merino endpoint URL, not including parameters. 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: browser.urlbar.exposureResults description: >- Comma-separated list of result type combinations, that are used to determine if an exposure event should be fired. showExposureResults: type: boolean setPref: browser.urlbar.showExposureResults description: >- Boolean used to determine if the results defined in `exposureResults` should be shown in search results. Should be false for Control branch of an experiment. quickSuggestAllowPositionInSuggestions: type: boolean fallbackPref: browser.urlbar.quicksuggest.allowPositionInSuggestions description: Whether quick suggest results can be shown in position specified in the suggestions. quickSuggestBlockingEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.blockingEnabled description: Whether the usual non-best-match Suggest suggestions can be blocked. quickSuggestDataCollectionEnabled: type: boolean description: Whether data collection should be enabled by default. If this variable is specified, it will override the value implied by the scenario. It will never override the user's local preference to disable (or enable) data collection, if the user has already toggled that preference. quickSuggestEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.enabled description: Gate for the Firefox Suggest feature as a whole. If false, the Firefox Suggest preferences UI and Suggest suggestions will not be shown. If true, the preferences UI will be shown, and the user can turn suggestions on or off. quickSuggestImpressionCapsSponsoredEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.impressionCaps.sponsoredEnabled description: Whether sponsored suggestions are subject to impression frequency caps. If false, sponsored suggestions can be shown an unlimited number of times over any given period. If true, sponsored suggestion impressions will be subject to the caps in the remote settings configuration. quickSuggestImpressionCapsNonSponsoredEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.impressionCaps.nonSponsoredEnabled description: Whether non-sponsored suggestions are subject to impression frequency caps. If false, non-sponsored suggestions can be shown an unlimited number of times over any given period. If true, non-sponsored suggestion impressions will be subject to the caps in the remote settings configuration. quickSuggestNonSponsoredEnabled: type: boolean description: Whether non-sponsored suggestions should be enabled by default. If this variable is specified, it will override the value implied by the scenario. It will never override the user's local preference to disable (or enable) non-sponsored suggestions, if the user has already toggled that preference. quickSuggestNonSponsoredIndex: type: int fallbackPref: browser.urlbar.quicksuggest.nonSponsoredIndex description: >- The index of non-sponsored QuickSuggest results within the general group. A negative index is relative to the end of the group quickSuggestOnboardingDialogVariation: type: string description: >- Specify the messages/UI variation for QuickSuggest onboarding dialog. This value is case insensitive. quickSuggestRemoteSettingsDataType: type: string description: The `type` of the suggestions data in remote settings. If not specified, "data" is used. quickSuggestRemoteSettingsEnabled: type: boolean fallbackPref: browser.urlbar.quicksuggest.remoteSettings.enabled description: Whether Remote Settings is enabled as a quick suggest source quickSuggestScenario: # IMPORTANT: This should not have a fallbackPref. See UrlbarPrefs.jsm. type: string description: The Firefox Suggest scenario in which the user is enrolled enum: - history - offline - online quickSuggestShouldShowOnboardingDialog: type: boolean fallbackPref: browser.urlbar.quicksuggest.shouldShowOnboardingDialog description: Whether or not to show the QuickSuggest onboarding dialog quickSuggestShowOnboardingDialogAfterNRestarts: type: int fallbackPref: browser.urlbar.quicksuggest.showOnboardingDialogAfterNRestarts description: Show QuickSuggest onboarding dialog after N browser restarts quickSuggestSponsoredEnabled: type: boolean description: Whether sponsored suggestions should be enabled by default. If this variable is specified, it will override the value implied by the scenario. It will never override the user's local preference to disable (or enable) sponsored suggestions, if the user has already toggled that preference. quickSuggestSponsoredIndex: type: int fallbackPref: browser.urlbar.quicksuggest.sponsoredIndex description: >- The index of sponsored QuickSuggest results within the general group. A negative index is relative to the end of the group recordNavigationalSuggestionTelemetry: type: boolean description: Whether to record navigational suggestion telemetry. Defaults to false. showSearchTermsFeatureGate: type: boolean fallbackPref: browser.urlbar.showSearchTerms.featureGate description: Gate for the show search terms feature. If false, the preference#search will not show the search terms feature checkbox, and search terms will never persist in the urlbar. If true, the preference checkbox will be shown on preferences#search, and the user can choose to persist search terms on or off in the urlbar. weatherFeatureGate: type: boolean fallbackPref: browser.urlbar.weather.featureGate description: >- Feature gate that controls whether all aspects of the weather suggestion feature are exposed to the user. See also `weatherKeywords` and `weatherKeywordsMinimumLength`. In summary: To enable the weather suggestion, set `weatherFeatureGate` to true, `weatherKeywords` to an array of full keyword strings, and `weatherKeywordsMinimumLength` to a non-zero integer. To disable the weather suggestion, leave out all weather-related variables. weatherKeywords: type: json description: >- An array of full keyword strings that will trigger the weather suggestion when the user types them in the address bar. If absent or null, Firefox will fall back to the weather keywords defined in remote settings. If neither Nimbus nor remote settings defines any keywords, the weather suggestion will be disabled. See also `weatherKeywordsMinimumLength`. weatherKeywordsMinimumLength: type: int description: >- If defined and non-zero, the weather suggestion will be triggered by typing any prefix of a full weather keyword when the prefix is at least `weatherKeywordsMinimumLength` characters long. If this variable is absent or zero, Firefox will fall back to the minimum length defined in remote settings. If neither Nimbus nor remote settings defines a minimum length, only full keywords will trigger the suggestion. See also `weatherKeywords`. weatherKeywordsMinimumLengthCap: type: int description: >- If defined and non-zero, the user will not be able to increment the minimum keyword length beyond this value. e.g., if this value is 6, the current minimum length is 5, and the user clicks "Show less frequently", then the minimum length will be incremented to 6, the "Show less frequently" command will be hidden, and the user can continue to trigger the weather suggestion by typing 6 characters, but they will not be able to increment the minimum length any further. If this variable is absent or zero, Firefox will fall back to the cap defined in remote settings. If neither Nimbus nor remote settings defines a cap, no cap will be used, and the user will be able to increment the minimum length without any limit. frecency: description: "The address bar ranking algorithm" owner: search-and-suggest-program@mozilla.com hasExposure: false isEarlyStartup: true variables: 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: "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: "places.frecency.origins.alternative.daysCutOff" aboutwelcome: description: "The about:welcome page" owner: omc@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent once per browsing session when the about:welcome URL is first accessed. isEarlyStartup: true variables: enabled: type: boolean fallbackPref: browser.aboutwelcome.enabled description: >- Should users see about:welcome? If this is false, users will see a regular new tab instead. id: type: string description: >- Descriptive ID for the about:welcome content screens: type: json fallbackPref: browser.aboutwelcome.screens description: Content to show in the onboarding flow languageMismatchEnabled: type: boolean fallbackPref: intl.multilingual.aboutWelcome.languageMismatchEnabled description: >- Suggest to change the language on about:welcome when there is a mismatch with the OS. transitions: type: boolean description: Enable transition effect between screens showModal: type: boolean fallbackPref: browser.aboutwelcome.showModal description: >- Should users see window modal onboarding backdrop: type: string fallbackPref: browser.aboutwelcome.backdrop description: >- Specify the color to be used to update the background color 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. abouthomecache: description: "The startup about:home cache." owner: omc@mozilla.com hasExposure: false isEarlyStartup: true variables: enabled: type: boolean fallbackPref: browser.startup.homepage.abouthome_cache.enabled description: Is the feature enabled? newtab: description: "The about:newtab page" owner: omc@mozilla.com hasExposure: true exposureDescription: >- Exposure is sent once per browsing session when the first newtab page loads (either about:newtab or about:home). isEarlyStartup: true variables: newTheme: type: boolean description: Enable the new theme customizationMenuEnabled: type: boolean fallbackPref: browser.newtabpage.activity-stream.customizationMenu.enabled description: Enable the customization panel inside of the newtab prefsButtonIcon: type: string description: Icon url to use for the preferences button topSitesContileEnabled: type: boolean fallbackPref: browser.topsites.contile.enabled description: Enable the Contile integration for Sponsored Top Sites topSitesUseAdditionalTilesFromContile: type: boolean description: Allow Contile to use additonal sponsored top sites pocketNewtab: description: The Pocket section in newtab owner: sdowne@getpocket.com hasExposure: false isEarlyStartup: true variables: spocPositions: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spoc-positions description: CSV string of spoc position indexes on newtab Pocket grid spocTopsitesPositions: type: string fallbackPref: browser.newtabpage.activity-stream.discoverystream.spoc-topsites-positions description: CSV string of spoc position indexes on newtab topsites section 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. 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. recsPersonalized: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.recs.personalized description: >- Enables Pocket stories personalization. spocsPersonalized: type: boolean fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.spocs.personalized description: >- Enables Pocket sponsored content personalization. spocsCacheTimeout: type: int fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.spocs.cacheTimeout description: >- Set sponsored content cache timeout in minutes. discoveryStreamConfig: description: A JSON blob of discovery stream configuration. type: string setPref: "browser.newtabpage.activity-stream.discoverystream.config" spocsEndpoint: description: The URL for the spocs endpoint. type: string setPref: "browser.newtabpage.activity-stream.discoverystream.spocs-endpoint" regionStoriesConfig: description: A comma-separated list of region to get stories for. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.region-stories-config regionBffConfig: type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.region-bff-config description: A comma-separated list of regions to get stories from the recommendations BFF. Also requires region-stories-config. regionStoriesBlock: description: A comma-separated list of regions that do not get stories, regardless of locale-list-config. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.region-stories-block localeListConfig: description: A comma-separated list of locales that get stories, regardless of region-stories-config. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.locale-list-config regionSpocsConfig: description: A comma-separated list of regions that get spocs by default. type: string fallbackPref: >- browser.newtabpage.activity-stream.discoverystream.region-spocs-config topSitesMaxSponsored: # Defined under `pocketNewtab` as it needs to be used along with other variables type: int description: The maximum number of sponsored Top Sites to be displayed topSitesContileMaxSponsored: # Defined under `pocketNewtab` as it needs to be used along with other variables type: int description: The maximum number of sponsored Top Sites used from Contile topSitesContileSovEnabled: # Defined under `pocketNewtab` as it needs to be used along with other variables description: Enable the Share-of-Voice feature for Sponsored Topsites. type: boolean fallbackPref: >- browser.topsites.contile.sov.enabled saveToPocket: description: The save to Pocket feature owner: sdowne@getpocket.com hasExposure: false isEarlyStartup: true variables: emailButton: type: boolean fallbackPref: extensions.pocket.refresh.emailButton.enabled description: Just for the new Pocket panels, enables the email signup button. hideRecentSaves: type: boolean fallbackPref: extensions.pocket.refresh.hideRecentSaves.enabled description: Hides the recently saved section in the home panel. bffRecentSaves: type: boolean fallbackPref: "extensions.pocket.bffRecentSaves" description: Use the new BFF Proxy Service instead of the legacy Pocket Service for Recent Saves bffApi: type: string fallbackPref: "extensions.pocket.bffApi" description: BFF Proxy Service domain oAuthConsumerKeyBff: type: string fallbackPref: "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? shellService: description: "Interface with OS, e.g., pinning and set default" owner: desktop-integrations@mozilla.com hasExposure: false isEarlyStartup: true variables: disablePin: type: boolean description: Disable pin to taskbar feature setDefaultBrowserUserChoice: type: boolean fallbackPref: browser.shell.setDefaultBrowserUserChoice description: Should it set as default browser setDefaultPDFHandler: type: boolean fallbackPref: browser.shell.setDefaultPDFHandler description: Should setting it as the default browser set it as the default PDF handler. setDefaultPDFHandlerOnlyReplaceBrowsers: type: boolean fallbackPref: browser.shell.setDefaultPDFHandler.onlyReplaceBrowsers description: >- Should setting it as the default PDF handler only replace existing PDF handlers that are browsers, and not other PDF handlers such as Acrobat Reader or Nitro PDF. upgradeDialog: description: The dialog shown for major upgrades owner: omc@mozilla.com hasExposure: false isEarlyStartup: true variables: enabled: type: boolean fallbackPref: browser.startup.upgradeDialog.enabled description: Is the feature enabled? readerMode: description: Firefox Reader Mode owner: sdowne@getpocket.com hasExposure: false isEarlyStartup: true variables: pocketCTAVersion: type: string fallbackPref: reader.pocket.ctaVersion description: >- What version of Pocket CTA to show in Reader Mode (Empty string is no CTA) 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ # # Before each Nightly leaves the station for Beta, we're currently # experimenting with ensuring that we have enough fx-messages-* messages to # accomodate all the rollout possibilities for Release that we're aware of, # plus one for a buffer just-in-case. # # When adding an fxms-message-* feature id, be sure to also add it to the # MESSAGING_EXPERIMENTS_DEFAULT_FEATURES list in ASRouter. # currently in use by 107+ exp/rollout pair of Import Bookmarks Infrequent # Existing Users with 5 bookmarks: # https://experimenter.services.mozilla.com/nimbus/import-infrequent-rollout-make-yourself-at-home/summary 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next planned use: 110+ exp/rollout pair of Fox Doodle: Pin experiment winner # (Existing Users) # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next planned use: 110+ exp/rollout pair of Fox Doodle: Set Default (Existing # Users) # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next potential planned use: 111+ exp/rollout pair for PDF annotations callout # (https://mozilla-hub.atlassian.net/browse/FXE-83) experiment. # # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next potential planned use: 112+ holdback/rollout pair for default PDF handler # (https://mozilla-hub.atlassian.net/browse/FXE-91) experiment. # # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next potential planned use: 114+ possible holdback/rollout pair (Device Migration): # https://mozilla-hub.atlassian.net/browse/FXE-271 # # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next planned use: buffer, for the unexpected # # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next planned use: buffer, for the unexpected # # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next planned use: buffer, for the unexpected # # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next planned use: buffer, for the unexpected # # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} # next planned use: buffer, for the unexpected # # More info about the fx-message-* feature id prototype is available at: # https://docs.google.com/document/d/1KdtaNycZL5j240nXofbibm9yKh7qVvu1-uZFLdmYM7Y/ 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." isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json" variables: {} 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. isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/MessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/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. isEarlyStartup: false schema: uri: "resource://activity-stream/schemas/BackgroundTaskMessagingExperiment.schema.json" path: "browser/components/newtab/content-src/asrouter/schemas/BackgroundTaskMessagingExperiment.schema.json" variables: {} 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 collection SDK within Firefox Desktop" owner: glean-team@mozilla.com hasExposure: false variables: finalInactive: type: "boolean" description: "Enables FOG early shutdown pings when true" newtabPingEnabled: type: "boolean" fallbackPref: "browser.newtabpage.ping.enabled" description: "Whether to submit the 'newtab' ping" gleanMetricConfiguration: type: json description: >- "A map of metric base-identifiers to booleans representing the state of the 'disabled' flag for that metric" majorRelease2022: description: Major Release 2022 owner: firefoxview@mozilla.com hasExposure: false isEarlyStartup: true variables: feltPrivacyPBMDarkTheme: type: boolean fallbackPref: "browser.theme.dark-private-windows" description: "Use dark theme variant for PBM windows. This is only supported if the theme sets darkTheme data." feltPrivacyPBMNewIndicator: type: boolean fallbackPref: "browser.privatebrowsing.enable-new-indicator" description: "Enables the new private browsing indicator." feltPrivacyPBMNewLogo: type: boolean fallbackPref: "browser.privatebrowsing.enable-new-logo" description: "Enables the new about:privatebrowsing logo." feltPrivacyShowPreferencesSection: type: boolean fallbackPref: "browser.privacySegmentation.preferences.show" description: "Controls visibility of the privacy segmentation preferences section." feltPrivacyWindowSeparation: type: boolean fallbackPref: "browser.privateWindowSeparation.enabled" description: "Whether or not private browsing windows use a separate icon in the Windows taskbar" colorwayCloset: type: boolean fallbackPref: "browser.theme.colorway-closet" description: "Whether or not to show the colorway closet modal" firefoxView: type: boolean fallbackPref: "browser.tabs.firefox-view" description: "Whether or not to show the firefox view tab" onboarding: type: boolean fallbackPref: "browser.majorrelease.onboarding" description: "Whether or not to use the MR2022 onboarding settings." featureCallout: description: "Prefs that control users' progress through Feature Callout tours" owner: omc@mozilla.com hasExposure: false isEarlyStartup: false variables: pdfJsTourProgress: description: A JSON String representing the intitial state of the pref that holds the progress of the PDF.js feature tour. type: string setPref: "browser.pdfjs.feature-tour" 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: "browser.lowMemoryResponseMask" lowMemoryResponseOnWarn: description: Controls which macOS memory-pressure levels trigger the browser low memory response. type: boolean setPref: "browser.lowMemoryResponseOnWarn" tabsUnloadOnLowMemory: description: Whether to unload tabs when available memory is running low. type: boolean setPref: "browser.tabs.unloadOnLowMemory" scriptLoaderPrefs: description: Prefs that control the script loader. owner: npierron@mozilla.com hasExposure: false variables: delazificationStrategy: description: >- Selects which parsing/delazification strategy should be used while parsing scripts off-main-thread. See DelazificationOption in CompileOptions.h for values. type: int setPref: "dom.script_loader.delazification.strategy" echPrefs: description: Prefs that control Encrypted Client Hello. owner: djackson@mozilla.com hasExposure: false variables: tlsEnabled: description: Whether to enable ECH for connections using TLS type: boolean setPref: "network.dns.echconfig.enabled" h3Enabled: description: Whether to enable ECH for connections using H3/QUIC type: boolean setPref: "network.dns.http3_echconfig.enabled" forceWaitHttpsRR: description: Whether to force waiting for HTTPS DNS records, which ECH requires. type: boolean setPref: "network.dns.force_waiting_https_rr" insecureFallback: description: Whether to fallback to non-ECH connections if all ECH RRs fail. type: boolean setPref: "network.dns.echconfig.fallback_to_origin_when_all_failed" tlsGreaseProb: description: Probability of GREASEing a TLS connection with ECH (0-100). type: int setPref: "security.tls.ech.grease_probability" h3GreaseEnabled: description: Whether to apply GREASE settings to H3/QUIC connections. type: boolean setPref: "security.tls.ech.grease_http3" disableGreaseOnFallback: description: Whether to disable GREASE when retrying a connection. type: boolean setPref: "security.tls.ech.disable_grease_on_fallback" greasePaddingSize: description: Assumed echConfig padding length for GREASE extensions (1-255). type: int setPref: "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: "network.trr.mode" trrUri: description: The URL of the DNS over HTTPS endpoint type: string setPref: "network.trr.uri" dohMode: description: Same as trrMode, but set by the DoHController module. type: int setPref: "doh-rollout.mode" dohUri: description: Same as trrUri, but set by the DoHController module. type: string setPref: "doh-rollout.uri" enableFallbackWarningPage: description: Whether DoH fallback warning page will be displayed when DoH doesn't work in TRR first mode. type: boolean setPref: "network.trr.display_fallback_warning" showFallbackCheckbox: description: Whether the checkbox to enable the fallback warning page is displayed in the settings UI. type: boolean setPref: "network.trr_ui.show_fallback_warning_option" 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: "network.trr.use_ohttp" ohttpRelayUri: description: The URL of the Oblivious HTTP relay type: string setPref: "network.trr.ohttp.relay_uri" ohttpConfigUri: description: The URL used to fetch the configuration of the Oblivious HTTP gateway type: string setPref: "network.trr.ohttp.config_uri" ohttpUri: description: The URL of the Oblivious DNS over HTTPS target resource type: string setPref: "network.trr.ohttp.uri" networking: description: "Firefox Networking (Necko)" owner: vgosu@mozilla.com hasExposure: false variables: ehPreloadEnabled: description: Whether Early Hints preload is enabled type: boolean setPref: "network.early-hints.enabled" ehPreconnectEnabled: description: Whether Early Hints preconnect is enabled type: boolean setPref: "network.early-hints.preconnect.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 isEarlyStartup: true # Data is sent on startup with a trigger in BrowserGlue.sys.mjs variables: enabled: type: boolean fallbackPref: toolkit.telemetry.dap_enabled description: Whether to automatically send DAP measurements. task1Enabled: type: boolean fallbackPref: toolkit.telemetry.dap_task1_enabled description: Whether to send fake measurements for verification task 1. 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: "privacy.annotate_channels.strict_list.pbmode.enabled" fxaButtonVisibility: description: Prefs to control the visibility of the Firefox Accounts toolbar button when not signed in. owner: mconley@mozilla.com hasExposure: false isEarlyStartup: true variables: boolean: description: True if the Firefox Accounts toolbar button should be visible when not signed in. type: boolean setPref: identity.fxaccounts.toolbar.defaultVisible legacyHeartbeat: description: Normandy Heartbeat exposed to Nimbus owner: barret@mozilla.com hasExposure: false schema: uri: "resource://normandy/schemas/LegacyHeartbeat.schema.json" path: "toolkit/components/normandy/schemas/LegacyHeartbeat.schema.json" variables: survey: type: json description: The Heartbeat survey parameters. queryStripping: description: Query parameter stripping anti-tracking feature. owner: pbz@mozilla.com hasExposure: false variables: enabledNormalBrowsing: type: boolean setPref: privacy.query_stripping.enabled description: Enables / disables URL query string stripping in normal browsing mode. enabledPrivateBrowsing: type: boolean setPref: privacy.query_stripping.enabled.pbmode description: Enables / disables URL query string stripping in private browsing mode. allowList: type: string setPref: 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: 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: layout.css.font-visibility.trackingprotection description: Set the Font Visibility level when Enhanced Tracking Protection is enabled enabledStandard: type: int setPref: layout.css.font-visibility.standard description: Set the Font Visibility level for normal browsing enabledPBM: type: int setPref: 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: privacy.fingerprintingProtection description: Enables / disables fingerprinting protection in normal browsing mode. enabledPrivate: type: boolean setPref: privacy.fingerprintingProtection.pbmode description: Enables / disables fingerprinting protection in private browsing mode. overrides: type: string setPref: privacy.fingerprintingProtection.overrides description: >- The protection overrides to add or remove fingerprinting protection targets. Please check RFPTargets.inc for all supported targets. migrationWizard: description: Prefs to control the Migration Wizard UI. owner: mconley@mozilla.com hasExposure: false isEarlyStartup: true variables: useNewWizard: description: True if the new migration wizard should be used. type: boolean setPref: browser.migrate.content-modal.enabled 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: 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: 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. "legacy": The legacy wizard will be opened from about:welcome, even if the new wizard is enabled by default. "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: browser.migrate.content-modal.about-welcome-behavior 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: boolean: description: True if the mixed content upgrading pref is enabled type: boolean setPref: security.mixed_content.upgrade_display_content jsParallelParsing: description: Pref to toggle JS parallel parsing. owner: dpalmeiro@mozilla.com, nbp@mozilla.com isEarlyStartup: true hasExposure: false variables: enabled: description: True to enable parallel parsing. type: boolean setPref: "javascript.options.parallel_parsing" gcParallelMarking: description: Pref to toggle parallel marking in the GC. owner: dpalmeiro@mozilla.com, jonco@mozilla.com isEarlyStartup: true hasExposure: false variables: enabled: description: True to enable parallel marking. type: boolean setPref: "javascript.options.mem.gc_parallel_marking" jitThresholds: description: Prefs that control jit tier thresholds. owner: dpalmeiro@mozilla.com, jdemooij@mozilla.com isEarlyStartup: true hasExposure: false variables: blinterp_threshold: description: Set the threshold to enable blinterp compilation. type: int setPref: "javascript.options.blinterp.threshold" baseline_threshold: description: Set the threshold to enable baseline compilation. type: int setPref: "javascript.options.baselinejit.threshold" ion_threshold: description: Set the threshold to enable ion compilation. type: int setPref: "javascript.options.ion.threshold" ion_bailout_threshold: description: Set the ion frequent bailout threshold. type: int setPref: "javascript.options.ion.frequent_bailout_threshold" ion_offthread_compilation: description: True to enable offthread ion compilations. type: boolean setPref: "javascript.options.ion.offthread_compilation" inlining_max_length: description: Set the max bytecode length considered for inlining. type: int setPref: "javascript.options.inlining_bytecode_max_length" jitHintsCache: description: Pref to toggle the JIT hints cache. owner: dpalmeiro@mozilla.com isEarlyStartup: true hasExposure: false variables: enabled: description: True to enable the hints cache. type: boolean setPref: "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: "network.http.rcwn.enabled" httpSpeculativeParallelLimit: description: Prefs to control the http speculative parallel limit. owner: dpalmeiro@mozilla.com, acreskey@mozilla.com hasExposure: false variables: speculative_parallel_limit: description: Maximum number of parallel speculative connections. type: int setPref: "network.http.speculative-parallel-limit" deviceMigration: description: Prefs to control aspects of the new device migration experiment owner: hjones@mozilla.com hasExposure: false isEarlyStartup: true variables: helpMenuHidden: description: True if new help menu item should be hidden type: boolean fallbackPref: browser.device-migration.help-menu.hidden opaqueResponseBlocking: description: Prefs to enable Opaque Response Blocking owner: farre@mozilla.com isEarlyStartup: true hasExposure: true exposureDescription: Exposure is sent when a response is blocked variables: enabled: description: Whether ORB is enabled type: boolean setPref: "browser.opaqueResponseBlocking" javascriptValidator: description: Whether JavaScript validation for ORB is enabled type: boolean setPref: "browser.opaqueResponseBlocking.javascriptValidator" filterFetchResponse: description: Whether filtering of internal responses in the parent ORB is enabled type: int setPref: "browser.opaqueResponseBlocking.filterFetchResponse" mediaExceptionsStrategy: description: >- If we partially or wholly allow audio and video MIME types in conflict with spec. type: int setPref: "browser.opaqueResponseBlocking.mediaExceptionsStrategy"