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Diffs Firefox 139.0-140.0
✅ New keys in 140.0
browser.newtabpage.activity-stream.discoverystream.ohttp.configURL
:https://prod.ohttp-gateway.prod.webservices.mozgcp.net/ohttp-configs
browser.contextual-services.contextId.rust-component.enabled
:false
browser.newtabpage.activity-stream.feeds.inferredpersonalizationfeed
:true
browser.contextual-services.contextId.rotation-in-days
:0
browser.newtabpage.activity-stream.system.showSponsoredCheckboxes
:false
browser.newtabpage.activity-stream.discoverystream.ohttp.relayURL
:https://mozilla-ohttp.fastly-edge.com/
browser.urlbar.mdn.featureGate
:false
browser.newtabpage.activity-stream.discoverystream.placements.contextualSpocs.counts
:1, 1, 1, 1, 1, 1
browser.urlbar.update2.engineAliasRefresh
:true
browser.newtabpage.activity-stream.discoverystream.sections.contextualAds.locale-config
:en-US,en-GB,en-CA
browser.newtabpage.activity-stream.discoverystream.merino-provider.ohttp.enabled
:false
browser.newtabpage.activity-stream.showSponsoredCheckboxes
:true
browser.newtabpage.activity-stream.discoverystream.refinedCardsLayout.enabled
:false
browser.newtabpage.activity-stream.discoverystream.sections.contextualAds.region-config
:""
browser.newtabpage.activity-stream.discoverystream.sections.personalization.inferred.model.override
:""
browser.newtabpage.activity-stream.discoverystream.placements.contextualSpocs
:newtab_stories_1, newtab_stories_2, newtab_stories_3, newtab_stories_4, newtab_stories_5, newtab_stories_6
browser.urlbar.suggest.semanticHistory.minLength
:5
browser.urlbar.yelp.serviceResultDistinction
:false
browser.newtabpage.activity-stream.discoverystream.sections.contextualAds.enabled
:false
browser.ml.linkPreview.collapsed
:false
browser.ml.linkPreview.ignoreMs
:2000
browser.ml.linkPreview.longPress
:true
browser.ml.linkPreview.longPressMs
:1000
browser.ml.linkPreview.optin
:false
browser.ml.linkPreview.recentTypingMs
:1000
browser.ml.linkPreview.shift
:true
browser.ml.linkPreview.shiftAlt
:false
browser.newtabpage.activity-stream.telemetry.privatePing.inferredInterests.enabled
:false
browser.newtabpage.activity-stream.telemetry.privatePing.maxSubmissionDelayMs
:5000
browser.newtabpage.activity-stream.telemetry.privatePing.redactNewtabPing.enabled
:false
browser.newtabpage.activity-stream.unifiedAds.ohttp.enabled
:false
dom.cookieStore.extra.enabled
:false
dom.dialog.light-dismiss.enabled
:false
dom.event.mouse.boundary.restore_last_over_target_from_temporary_removal
:false
dom.event.pointer.boundary.dispatch_when_layout_change
:true
dom.event.pointer.rawupdate.enabled
:true
dom.w3c_pointer_events.dispatch_click_on_pointer_capturing_element
:true
dom.w3c_pointer_events.dispatch_click_on_pointer_capturing_element.except_touch
:true
extensions.htmlaboutaddons.local_model_management
:true
gfx.webrender.debug.highlight-backdrop-filters
:false
image.natural-size-fallback.enabled
:false
javascript.options.atomics_wait_async
:false
javascript.options.experimental.self_hosted_cache
:false
javascript.options.ion.regalloc
:0
javascript.options.mem.nursery_max_time_goal_ms
:4
javascript.options.warn_asmjs_deprecation
:true
javascript.options.wasm_trace_api
:false
layout.css.android-pip.enabled
:true
layout.css.light-dark.images.enabled
:false
network.android_doh.autoselect_enabled
:false
network.connectivity-service.wait_for_idle_startup
:true
network.dns.always_ai_canonname
:true
network.dns.native_https_timeout_mac
:5000
network.http.http3.ecn_mark
:false
network.http.http3.ecn_report
:true
network.sniff.use_extension
:false
nimbus.profilesdatastoreservice.enabled
:true
pdfjs.capCanvasAreaFactor
:200
places.semanticHistory.featureGate
:false
remote.experimental-parent-navigation.enabled
:false
security.csp.reporting.enabled
:true
urlclassifier.delay_prefixes_crc32_check
:false
widget.gtk.clipboard_timeout_ms
:1000
❌ Removed keys in 140.0
browser.urlbar.suggest.pocket
browser.newtabpage.activity-stream.discoverystream.sections.personalization.inferred.position
browser.urlbar.pocket.featureGate
browser.newtabpage.activity-stream.discoverystream.sections.personalization.inferred.blocked
browser.newtabpage.activity-stream.newtabAdSize.variant-a
browser.newtabpage.activity-stream.newtabAdSize.variant-b
browser.newtabpage.activity-stream.newtabWallpapers.v2.enabled
browser.shopping.experience2023.active
browser.shopping.experience2023.ads.enabled
browser.shopping.experience2023.ads.userEnabled
browser.shopping.experience2023.autoOpen.enabled
browser.shopping.experience2023.autoOpen.userEnabled
browser.shopping.experience2023.enabled
browser.shopping.experience2023.integratedSidebar
browser.shopping.experience2023.newPositionCard.hasSeen
browser.shopping.experience2023.optedIn
browser.shopping.experience2023.showKeepSidebarClosedMessage
browser.shopping.experience2023.sidebarClosedCount
browser.shopping.experience2023.survey.enabled
browser.shopping.experience2023.survey.hasSeen
browser.shopping.experience2023.survey.pdpVisits
devtools.debugger.features.codemirror-next
dom.element.customstateset.enabled
dom.element.dialog.toggle_events.enabled
dom.viewTransitions.live-capture
dom.webcomponents.shadowdom.declarative.enabled
extensions.screenshots.disabled
layout.css.light-dark.enabled
network.http.http3.ecn
security.mixed_content.block_object_subrequest
security.sandbox.content.headless
security.xfocsp.errorReporting.automatic
security.xfocsp.errorReporting.enabled
sidebar.newTool.migration.reviewchecker
toolkit.shopping.environment
toolkit.shopping.experience2023.defr
🔁 Changed values in 140.0
browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.region-thumbs-config
:""
->US
browser.urlbar.addons.featureGate
:true
->false
browser.urlbar.scotchBonnet.enableOverride
:false
->true
browser.urlbar.weather.featureGate
:true
->false
browser.newtabpage.activity-stream.support.url
:https://support.mozilla.org/1/firefox/139.0/Linux/en-US/new-tab
->https://support.mozilla.org/1/firefox/140.0/Linux/en-US/new-tab
browser.urlbar.yelp.featureGate
:true
->false
browser.ml.minimumPhysicalMemory
:4
->3
browser.newtabpage.activity-stream.newtabWallpapers.customColor.enabled
:false
->true
browser.newtabpage.activity-stream.newtabWallpapers.customWallpaper.enabled
:false
->true
browser.search.rustSelector.featureGate
:false
->true
browser.tabs.fadeOutExplicitlyUnloadedTabs
:false
->true
browser.tabs.unloadTabInContextMenu
:false
->true
dom.cookieStore.enabled
:false
->true
dom.cookieStore.manager.enabled
:false
->true
dom.customHighlightAPI.enabled
:false
->true
dom.mutation_events.enabled
:true
->false
dom.security.html_serialization_escape_lt_gt
:false
->true
dom.serviceWorkers.privateBrowsing.enabled
:false
->true
dom.timeout.defer_during_load.force-disable
:*.usps.com, *.nvidia.com, *.fedex.com, *.msci.com
->*.usps.com, *.nvidia.com, *.fedex.com, *.msci.com, *.the-saleroom.com
extensions.dataCollectionPermissions.enabled
:false
->true
extensions.ml.enabled
:false
->true
extensions.pocket.enabled
:true
->false
javascript.options.property_error_message_fix
:false
->true
javascript.options.wasm_lazy_tiering
:false
->true
layout.css.h1-in-section-ua-styles.enabled
:true
->false
layout.css.video-dynamic-range.allows-high
:false
->true
media.peerconnection.dtls.version.max
:771
->772
network.cookie.chips.partitionLimitDryRun
:false
->true
security.sandbox.content.level
:4
->6
security.sandbox.socket.process.level
:1
->2
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