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# 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
# 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
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.
pocketFeatureGate:
type: boolean
fallbackPref: browser.urlbar.pocket.featureGate
description: >-
Feature gate that controls whether all aspects of the Pocket suggestions
feature are exposed to the user.
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
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:
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:
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:
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:
path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json"
variables: {}
# More info about the fx-message-* feature id prototype is available at:
#
# 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:
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:
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:
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:
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:
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:
path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json"
variables: {}
# next potential planned use: 111+ exp/rollout pair for PDF annotations callout
#
# More info about the fx-message-* feature id prototype is available at:
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:
path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json"
variables: {}
# next potential planned use: 112+ holdback/rollout pair for default PDF handler
#
# More info about the fx-message-* feature id prototype is available at:
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:
path: "browser/components/newtab/content-src/asrouter/schemas/MessagingExperiment.schema.json"
variables: {}
# next potential planned use: 114+ possible holdback/rollout pair (Device Migration):
#
# More info about the fx-message-* feature id prototype is available at:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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:
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.
"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
shopping2023:
description: Prefs to control the 2023 shopping experiment.
owner: jhirsch@mozilla.com
hasExposure: true
exposureDescription: >-
The timing of the exposure event depends on the experiment, but generally
the event is recorded when the user first encounters onboarding UI for
the shopping feature.
variables:
enabled:
description: True if the experience is enabled
type: boolean
fallbackPref: browser.shopping.experience2023.enabled
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"