ToDo: diffs FF144-FF149
enhancementtaskdiffs
# 144.0
92 diffs (48 new, 19 gone, 25 different)
### new in 144.0:
```js
user_pref("about.glean.redesign.enabled", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.dailyBrief.enabled", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.dailyBrief.sectionId", "top_stories_section");
user_pref("browser.newtabpage.activity-stream.newtabWallpapers.customWallpaper.theme", "");
user_pref("browser.newtabpage.activity-stream.weather.placement", "header");
user_pref("browser.newtabpage.activity-stream.widgets.lists.badge.enabled", false);
user_pref("browser.newtabpage.activity-stream.widgets.lists.badge.label", "");
user_pref("browser.safebrowsing.provider.google5.enabled", false);
user_pref("browser.safebrowsing.provider.google5.gethashURL", "https://safebrowsing.googleapis.com/v5/hashes:search?key=%GOOGLE_SAFEBROWSING_API_KEY%");
user_pref("browser.safebrowsing.provider.google5.lists", "");
user_pref("browser.safebrowsing.provider.google5.updateURL", "https://safebrowsing.googleapis.com/v5/hashLists:batchGet?key=%GOOGLE_SAFEBROWSING_API_KEY%");
user_pref("browser.search.suggest.ohttp.enabled", true);
user_pref("browser.search.suggest.ohttp.featureGate", false);
user_pref("browser.tabs.dragDrop.pinInteractionCue.delayMS", 500);
user_pref("browser.urlbar.allowSearchSuggestionsForSimpleOrigins", true);
user_pref("browser.urlbar.suggest.yelpRealtime", true);
user_pref("browser.urlbar.yelpRealtime.featureGate", false);
user_pref("browser.urlbar.yelpRealtime.minKeywordLength", 0);
user_pref("clipboard.copyPrivateDataToClipboardCloudOrHistory", false);
user_pref("devtools.anti-tracking.enabled", false);
user_pref("dom.media.webcodecs.batch-encoding-size", 1);
user_pref("dom.object_embed.type_hint.enabled", false);
user_pref("dom.security.framebusting_intervention.enabled", true);
user_pref("dom.shadowdom.referenceTarget.enabled", false);
user_pref("dom.storage_access.headers.enabled", false);
user_pref("dom.webgpu.allow-in-parent", true);
user_pref("dom.webnotifications.forbid_nested_first_party.enabled", true);
user_pref("gfx.canvas.accelerated.allow-in-parent", true);
user_pref("javascript.options.baselinejit.offthread_compilation_strategy", 2);
user_pref("javascript.options.experimental.upsert", true);
user_pref("layout.css.ruby.normalize-metrics-factor", 0);
user_pref("mathml.math_shift.enabled", false);
user_pref("mathml.rtl_operator_mirroring.enabled", false);
user_pref("media.cubeb.force_mock_context", false);
user_pref("media.mkv.enabled", false);
user_pref("network.auth.sspi_detect_hash", true);
user_pref("network.http.http2.max_stream_id", 125829120);
user_pref("network.lna.allow_top_level_navigation", true);
user_pref("network.mimesniff.extra_moz_html_tags", false);
user_pref("pdfjs.enableOptimizedPartialRendering", false);
user_pref("print.cups.monochrome-gtk-simple.enabled", true);
user_pref("privacy.fingerprintingProtection.testing", false);
user_pref("privacy.trackingprotection.allow_list.hasUserInteractedWithETPSettings", false);
user_pref("security.webauthn.always_allow_direct_attestation", false);
user_pref("toolkit.download.loglevel", "Error");
user_pref("toolkit.gecko-trace.enable", false);
user_pref("toolkit.rust-components.logging.crates", "");
user_pref("toolkit.rust-components.logging.internal-level", "Warn");
```
### removed, renamed or hidden in 144.0:
```js
user_pref("browser.download.loglevel", "Error");
user_pref("browser.newtabpage.activity-stream.discoverystream.merino-provider.enabled", true);
user_pref("browser.newtabpage.activity-stream.discoverystream.onboardingExperience.dismissed", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.onboardingExperience.enabled", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.region-bff-config", "US,DE,CA,GB,IE,CH,AT,BE,IN,FR,IT,ES");
user_pref("browser.newtabpage.activity-stream.discoverystream.spocMessageVariant", "");
user_pref("browser.newtabpage.activity-stream.feeds.section.topstories.options", "{"api_key_pref":"extensions.pocket.oAuthConsumerKey","hidden":true,"provider_icon":"chrome://global/skin/icons/help.svg","provider_name":"Pocket","read_more_endpoint":"https://getpocket.com/explore/trending?src=fx_new_tab","stories_endpoint":"https://getpocket.cdn.mozilla.net/v3/firefox/global-recs?version=3&consumer_key=$apiKey&locale_lang=en-US&feed_variant=default_spocs_off","stories_referrer":"https://getpocket.com/recommendations","topics_endpoint":"https://getpocket.cdn.mozilla.net/v3/firefox/trending-topics?version=2&consumer_key=$apiKey&locale_lang=en-US","show_spocs":false}");
user_pref("browser.privatebrowsing.vpnpromourl", "https://vpn.mozilla.org/?utm_source=firefox-browser&utm_medium=firefox-%CHANNEL%-browser&utm_campaign=private-browsing-vpn-link");
user_pref("dom.block_external_protocol_navigation_from_sandbox", true);
user_pref("dom.ipc.processPrelaunch.startupDelayMs", 1000);
user_pref("dom.mutation_events.enabled", false);
user_pref("dom.mutation_events.forceEnable", "");
user_pref("extensions.InstallTriggerImpl.enabled", false);
user_pref("javascript.options.experimental.promise_try", true);
user_pref("mathml.stixgeneral_operator_stretching.disabled", true);
user_pref("network.android_doh.autoselect_enabled", false);
user_pref("privacy.dynamic_firstparty.use_site.include_port", false);
user_pref("remote.parent-navigation.enabled", true);
user_pref("security.webauth.webauthn_testing_allow_direct_attestation", false);
```
### changed in 144.0:
```js
user_pref("browser.backup.scheduled.minimum-time-between-backups-seconds", 86400); // 3600
user_pref("browser.contextual-services.contextId.rotation-in-days", 15); // 30
user_pref("browser.ml.chat.page", true); // false
user_pref("browser.newtabpage.activity-stream.discoverystream.config", "{"collapsible":true,"enabled":true}"); // {"api_key_pref":"extensions.pocket.oAuthConsumerKey","collapsible":true,"enabled":true}
user_pref("browser.newtabpage.activity-stream.discoverystream.publisherFavicon.enabled", true); // false
user_pref("browser.newtabpage.activity-stream.discoverystream.refinedCardsLayout.enabled", true); // false
user_pref("browser.newtabpage.activity-stream.discoverystream.reportAds.enabled", true); // false
user_pref("browser.newtabpage.activity-stream.support.url", "https://support.mozilla.org/1/firefox/144.0/Linux/en-US/new-tab"); // https://support.mozilla.org/1/firefox/143.0/Linux/en-US/new-tab
user_pref("dom.document.edit_command.contentReadOnly.enabled", false); // true
user_pref("dom.document.edit_command.insertBrOnReturn.enabled", false); // true
user_pref("dom.element.commandfor.enabled", true); // false
user_pref("dom.events.script_execute.enabled", false); // true
user_pref("dom.movebefore.enabled", true); // false
user_pref("dom.performance.event_timing.enable_interactionid", true); // false
user_pref("dom.screenorientation.allow-lock", true); // false
user_pref("dom.viewTransitions.enabled", true); // false
user_pref("dom.w3c_pointer_events.getcoalescedevents_only_in_securecontext", true); // false
user_pref("gfx.webrender.dithering", true); // false
user_pref("media.navigator.video.default_resize_mode", 1); // 0
user_pref("media.navigator.video.resize_mode.enabled", true); // false
user_pref("network.predictor.enabled", false); // true
user_pref("network.proxy.testing_localhost_is_secure_when_hijacked", true); // false
user_pref("network.socket.ip_addr_any.disabled", true); // false
user_pref("security.disallow_privilegedabout_remote_script_loads", false); // true
user_pref("security.sdr.mechanism", 1); // 0
```
# 145.0
109 diffs (63 new, 19 gone, 27 different)
### new in 145.0:
```js
user_pref("browser.backup.archive.enabled", false);
user_pref("browser.backup.backup-retry-limit", 100);
user_pref("browser.backup.disabled-on-idle-backup-retry", false);
user_pref("browser.backup.errorCode", 0);
user_pref("browser.backup.max-num-unremovable-staging-items", 5);
user_pref("browser.backup.restore.enabled", false);
user_pref("browser.backup.scheduled.user-disabled", false);
user_pref("browser.ipProtection.domainExclusions", "");
user_pref("browser.ipProtection.exceptionsMode", "all");
user_pref("browser.ipProtection.userEnabled", false);
user_pref("browser.ml.smartAssist.apiKey", "");
user_pref("browser.ml.smartAssist.enabled", false);
user_pref("browser.ml.smartAssist.endpoint", "");
user_pref("browser.ml.smartAssist.model", "");
user_pref("browser.ml.smartAssist.overrideNewTab", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.optIn-region-weather-config", "DE,GB,FR,ES,IT,CH,AT,BE,IE,NL,PL,CZ,SE,SG,HU,SK,FI,DK,NO,PT");
user_pref("browser.newtabpage.activity-stream.discoverystream.spocs.onDemand", false);
user_pref("browser.newtabpage.activity-stream.system.showWeatherOptIn", false);
user_pref("browser.newtabpage.activity-stream.weather.optInAccepted", false);
user_pref("browser.newtabpage.activity-stream.weather.optInDisplayed", false);
user_pref("browser.newtabpage.activity-stream.weather.staticData.enabled", false);
user_pref("browser.profiles.forceEnableRefresh", false);
user_pref("browser.safebrowsing.provider.google5.advisoryName", "Google Safe Browsing");
user_pref("browser.safebrowsing.provider.google5.advisoryURL", "https://developers.google.com/safe-browsing/v4/advisory");
user_pref("browser.safebrowsing.provider.google5.reportMalwareMistakeURL", "https://%LOCALE%.malware-error.mozilla.com/?url=");
user_pref("browser.safebrowsing.provider.google5.reportPhishMistakeURL", "https://%LOCALE%.phish-error.mozilla.com/?url=");
user_pref("browser.safebrowsing.provider.google5.reportURL", "https://safebrowsing.google.com/safebrowsing/diagnostic?site=");
user_pref("browser.sessionstore.logFlushIntervalSeconds", 3600);
user_pref("browser.sessionstore.restore_windows_to_virtual_desktop", true);
user_pref("browser.settings-redesign.enabled", false);
user_pref("browser.urlbar.lastUrlbarSearchSeconds", 0);
user_pref("browser.urlbar.quicksuggest.online.enabled", true);
user_pref("browser.urlbar.trustPanel.featureGate", false);
user_pref("devtools.netmonitor.features.webtransport", false);
user_pref("dom.navigation.api.strict.enabled", false);
user_pref("dom.script_loader.experimental.navigation_cache", false);
user_pref("gfx.webrender.precise-conic-gradients", false);
user_pref("gfx.webrender.precise-conic-gradients-swgl", false);
user_pref("gfx.webrender.precise-linear-gradients", false);
user_pref("gfx.webrender.precise-linear-gradients-swgl", false);
user_pref("gfx.webrender.precise-radial-gradients", true);
user_pref("gfx.webrender.precise-radial-gradients-swgl", true);
user_pref("javascript.options.experimental.symbols_as_weakmap_keys", false);
user_pref("javascript.options.objectfuse_for_js_builtin_ctors_protos", true);
user_pref("javascript.options.use_js_microtask_queue", false);
user_pref("layers.gpu-process.allow-fallback-to-parent", true);
user_pref("layers.gpu-process.max_launch_attempts", 2);
user_pref("layout.css.module-scripts.enabled", false);
user_pref("layout.css.outline-offset.snapping", 2);
user_pref("layout.css.webkit-fill-available.all-size-properties.enabled", false);
user_pref("mathml.font_family_math.enabled", false);
user_pref("media.webrtc.enable_pq_hybrid_kex", true);
user_pref("media.webrtc.send_mlkem_keyshare", false);
user_pref("memory.phc.size_kb", 1152);
user_pref("network.http.accept-encoding.dictionary", "dcb, dcz");
user_pref("network.http.dictionaries.enable", false);
user_pref("network.http.http3.inner_fallback_delay", 3000);
user_pref("pdfjs.commentLearnMoreUrl", "https://support.mozilla.org/%LOCALE%/kb/view-pdf-files-firefox-or-choose-another-viewer#w_add-a-comment-to-a-pdf");
user_pref("privacy.wallet_schemes", "openid4vp,mdoc,mdoc-openid4vp,haip,eudi-wallet,eudi-openid4vp,openid-credential-offer");
user_pref("sidebar.animation.expand-on-hover.delay-duration-ms", 200);
user_pref("signon.rustMirror.enabled", false);
user_pref("ui.touch_hover.delay_ms", 100);
user_pref("widget.prefer_windows_on_current_virtual_desktop", true);
```
### removed, renamed or hidden in 145.0:
```js
user_pref("browser.backup.preferences.ui.enabled", false);
user_pref("dom.script_loader.navigation_cache", false);
user_pref("extensions.pocket.api", "api.getpocket.com");
user_pref("extensions.pocket.bffApi", "firefox-api-proxy.cdn.mozilla.net");
user_pref("extensions.pocket.bffRecentSaves", true);
user_pref("extensions.pocket.enabled", false);
user_pref("extensions.pocket.loggedOutVariant", "control");
user_pref("extensions.pocket.oAuthConsumerKey", "40249-e88c401e1b1f2242d9e441c4");
user_pref("extensions.pocket.oAuthConsumerKeyBff", "94110-6d5ff7a89d72c869766af0e0");
user_pref("extensions.pocket.refresh.emailButton.enabled", false);
user_pref("extensions.pocket.showHome", true);
user_pref("extensions.pocket.site", "getpocket.com");
user_pref("layout.css.basic-shape-rect.enabled", true);
user_pref("layout.css.basic-shape-xywh.enabled", true);
user_pref("layout.css.grid-flex-spanning-items-intrinsic-sizing.enabled", true);
user_pref("layout.css.overflow-clip-box.enabled", false);
user_pref("media.webrtc.enable_pq_dtls", false);
user_pref("network.webtransport.datagram_size", 1200);
user_pref("network.webtransport.datagrams.enabled", true);
```
### changed in 145.0:
```js
user_pref("accessibility.uia.enable", 2); // 0
user_pref("browser.backup.template.fallback-download.aurora", "https://www.firefox.com/channel/desktop/?utm_medium=firefox-desktop&utm_source=html-backup"); // https://www.mozilla.org/firefox/channel/desktop/?utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control#developer
user_pref("browser.backup.template.fallback-download.beta", "https://www.firefox.com/channel/desktop/?utm_medium=firefox-desktop&utm_source=html-backup"); // https://www.mozilla.org/firefox/channel/desktop/?utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control#beta
user_pref("browser.backup.template.fallback-download.esr", " https://www.firefox.com/download/all/desktop-esr/?utm_medium=firefox-desktop&utm_source=html-backup"); // https://www.mozilla.org/firefox/enterprise/?utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control#download
user_pref("browser.backup.template.fallback-download.nightly", "https://www.firefox.com/channel/desktop/?utm_medium=firefox-desktop&utm_source=html-backup"); // https://www.mozilla.org/firefox/channel/desktop/?utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control#nightly
user_pref("browser.backup.template.fallback-download.release", "https://www.firefox.com/?utm_medium=firefox-desktop&utm_source=html-backup"); // https://www.mozilla.org/firefox/download/thanks/?s=direct&utm_medium=firefox-desktop&utm_source=backup&utm_campaign=firefox-backup-2024&utm_content=control
user_pref("browser.contextual-password-manager.enabled", true); // false
user_pref("browser.contextual-services.contextId.rotation-in-days", 7); // 15
user_pref("browser.newtabpage.activity-stream.support.url", "https://support.mozilla.org/1/firefox/145.0/Linux/en-US/new-tab"); // https://support.mozilla.org/1/firefox/144.0/Linux/en-US/new-tab
user_pref("browser.safebrowsing.provider.google5.lists", "goog-phish-proto,googpub-phish-proto,goog-malware-proto,goog-unwanted-proto,goog-harmful-proto"); //
user_pref("browser.search.visualSearch.featureGate", true); // false
user_pref("browser.tabs.groups.hoverPreview.enabled", true); // false
user_pref("dom.text_fragments.create_text_fragment.enabled", true); // false
user_pref("extensions.cookie.rejectWhenInvalid", true); // false
user_pref("javascript.options.atomics_wait_async", true); // false
user_pref("layers.gpu-process.allow-software", true); // false
user_pref("layers.gpu-process.stable.min-uptime-ms", 30000); // 240000
user_pref("layout.css.text-autospace.enabled", true); // false
user_pref("media.mkv.enabled", true); // false
user_pref("network.http.http3.ecn_mark", true); // false
user_pref("network.http.http3.use_nspr_for_io", false); // true
user_pref("pdfjs.enableComment", true); // false
user_pref("pdfjs.enableHighlightFloatingButton", true); // false
user_pref("privacy.bounceTrackingProtection.requireStatefulBounces", false); // true
user_pref("reader.character_spacing", 1); // 0
user_pref("reader.word_spacing", 1); // 0
user_pref("security.integrity_policy.enabled", true); // false
```
# 146.0
105 diffs (41 new, 39 gone, 25 different)
### new in 146.0:
```js
user_pref("browser.backup.tab-flush-timeout", 5000);
user_pref("browser.ipProtection.added", false);
user_pref("browser.ipProtection.autoStartEnabled", false);
user_pref("browser.ipProtection.autoStartPrivateEnabled", false);
user_pref("browser.ipProtection.domainInclusions", "");
user_pref("browser.ipProtection.features.autoStart", false);
user_pref("browser.ipProtection.features.siteExceptions", false);
user_pref("browser.ipProtection.panelOpenCount", 0);
user_pref("browser.ml.linkPreview.supportedLocales", "en");
user_pref("browser.newtabpage.activity-stream.discoverystream.attribution.enabled", false);
user_pref("browser.newtabpage.activity-stream.feeds.newtabattributionfeed", true);
user_pref("browser.search.widget.new", false);
user_pref("browser.tabs.dragDrop.multiselectStacking", false);
user_pref("browser.tabs.notes.enabled", false);
user_pref("browser.tabs.splitView.enabled", false);
user_pref("browser.theme.forced-colors-override.enabled", true);
user_pref("browser.urlbar.flightStatus.featureGate", false);
user_pref("browser.urlbar.quicksuggest.online.available", false);
user_pref("browser.urlbar.sports.featureGate", false);
user_pref("browser.urlbar.suggest.quicksuggest.all", false);
user_pref("browser.urlbar.suggest.sports", true);
user_pref("devtools.selfxss.count", 0);
user_pref("devtools.toolbox.selectedTool", "inspector");
user_pref("dom.input.showPicker_datalist.enabled", false);
user_pref("gfx.canvas.accelerated.max-snapshot-pbo-memory", 67108864);
user_pref("gfx.webrender.debug.external-composite-borders", false);
user_pref("layers.gpu-process.launch-in-background", true);
user_pref("layout.css.contrast-color.enabled", true);
user_pref("layout.css.custom-media.enabled", false);
user_pref("layout.css.text-decoration-inset.enabled", true);
user_pref("network.cache.purge_disable", false);
user_pref("network.cache.suspended_writer_delay_ms", 5000);
user_pref("network.lna.benchmarking-is-local", false);
user_pref("network.lna.etp.enabled", false);
user_pref("network.lna.local-network-to-localhost.skip-checks", true);
user_pref("network.lna.skip-domains", "");
user_pref("network.lna.websocket.enabled", false);
user_pref("security.qwacs.enable_test_trust_anchors", false);
user_pref("security.restrict_to_adults.always", false);
user_pref("security.restrict_to_adults.respect_platform", false);
user_pref("termsofuse.firstAcceptedDate", 0);
```
### removed, renamed or hidden in 146.0:
```js
user_pref("browser.menu.showCharacterEncoding", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.enabled", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.ctaCopy", "");
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.ctaUrl", "");
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.defaultCategoryTitle", "");
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.enabled", true);
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.footerCopy", "");
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.feeds", "need_to_know, fakespot");
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.listFeedTitle", "");
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.locale-content-config", "en-US,en-GB,en-CA,de");
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.region-content-config", "");
user_pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.selectedFeed", "need_to_know");
user_pref("browser.newtabpage.activity-stream.system.showSponsoredCheckboxes", true);
user_pref("browser.preferences.experimental", true);
user_pref("browser.urlbar.update2.engineAliasRefresh", true);
user_pref("devtools.inspector.inactive.css.enabled", true);
user_pref("dom.events.script_execute.enabled", false);
user_pref("dom.workers.importScripts.enforceStrictMimeType", true);
user_pref("font.language.group", "x-western");
user_pref("font.size.inflation.disabledInMasterProcess", false);
user_pref("gfx.canvas.remote", false);
user_pref("gfx.canvas.remote.allow-in-parent", false);
user_pref("gfx.canvas.remote.worker-threads", 0);
user_pref("gfx.direct2d.disabled", true);
user_pref("gfx.direct2d.force-enabled", false);
user_pref("gfx.direct2d.target-independent-rasterization.disabled", false);
user_pref("intl.ellipsis", "…");
user_pref("intl.menuitems.alwaysappendaccesskeys", "");
user_pref("intl.menuitems.insertseparatorbeforeaccesskeys", true);
user_pref("javascript.options.experimental.json_parse_with_source", true);
user_pref("javascript.options.experimental.regexp_duplicate_named_groups", true);
user_pref("javascript.options.experimental.regexp_modifiers", true);
user_pref("layers.gpu-process.allow-software", true);
user_pref("layout.css.text-decoration-trim.enabled", false);
user_pref("mathml.centered_operators.disabled", true);
user_pref("mathml.top_bottom_spacing_for_stretchy_operators.disabled", true);
user_pref("mathml.unknown_mrow.enabled", true);
user_pref("privacy.query_stripping.strip_on_share.canDisable", true);
user_pref("services.sync.prefs.sync.browser.discovery.enabled", true);
```
### changed in 146.0:
```js
user_pref("browser.contentblocking.features.strict", "tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cryptoTP,fp,stp,emailTP,emailTPPrivate,-consentmanagerSkip,-consentmanagerSkipPrivate,lvl2,rp,rpTop,ocsp,qps,qpsPBM,fpp,fppPrivate,btp,lna"); // tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cryptoTP,fp,stp,emailTP,emailTPPrivate,-consentmanagerSkip,-consentmanagerSkipPrivate,lvl2,rp,rpTop,ocsp,qps,qpsPBM,fpp,fppPrivate,btp
user_pref("browser.migrate.ie.enabled", false); // true
user_pref("browser.ml.linkPreview.enabled", true); // false
user_pref("browser.ml.linkPreview.noKeyPointsRegions", ""); // AD,AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GR,HR,HU,IE,IS,IT,LI,LT,LU,LV,MT,NL,NO,PL,PT,RO,SE,SI,SK
user_pref("browser.newtabpage.activity-stream.discoverystream.sections.region-content-config", "US"); //
user_pref("browser.newtabpage.activity-stream.support.url", "https://support.mozilla.org/1/firefox/146.0/Linux/en-US/new-tab"); // https://support.mozilla.org/1/firefox/145.0/Linux/en-US/new-tab
user_pref("browser.newtabpage.activity-stream.weather.optInDisplayed", true); // false
user_pref("browser.newtabpage.activity-stream.weather.staticData.enabled", true); // false
user_pref("browser.safebrowsing.provider.google5.lists", "goog-badbinurl-proto,goog-downloadwhite-proto,goog-phish-proto,googpub-phish-proto,goog-malware-proto,goog-unwanted-proto,goog-harmful-proto"); // goog-phish-proto,googpub-phish-proto,goog-malware-proto,goog-unwanted-proto,goog-harmful-proto
user_pref("browser.urlbar.quicksuggest.settingsUi", 1); // 0
user_pref("gfx.webrender.precise-conic-gradients", true); // false
user_pref("gfx.webrender.precise-radial-gradients-swgl", false); // true
user_pref("intl.accept_languages", "und"); // en-US, en
user_pref("javascript.options.experimental.symbols_as_weakmap_keys", true); // false
user_pref("javascript.options.wasm_relaxed_simd", true); // false
user_pref("layers.gpu-process.startup_timeout_ms", 10000); // 5000
user_pref("layout.css.at-scope.enabled", true); // false
user_pref("layout.css.webkit-fill-available.enabled", true); // false
user_pref("mathml.math_shift.enabled", true); // false
user_pref("mathml.rtl_operator_mirroring.enabled", true); // false
user_pref("media.devices.enumerate.legacy.allowlist", "slack.com,*.slack.com,riverside.fm,*.riverside.fm"); // slack.com,*.slack.com
user_pref("media.peerconnection.sctp.use_dcsctp", true); // false
user_pref("media.webrtc.send_mlkem_keyshare", true); // false
user_pref("network.dns.resolver_shutdown_timeout_ms", 5000); // 2000
user_pref("widget.wayland.fractional-scale.enabled", true); // false
```
# 147.0
151 diffs (63 new, 71 gone, 17 different)
### new in 147.0:
```js
user_pref("accessibility.anchorPositionedAsDetails.enabled", false);
user_pref("apz.async_scroll_css_anchor_pos", true);
user_pref("browser.aiwindow.enabled", false);
user_pref("browser.ipProtection.optedOut", false);
user_pref("browser.ml.chat.shortcut.onboardingMouseoverCount", 0);
user_pref("browser.newtabpage.activity-stream.discoverystream.imageProxy.enabled", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.sections.clientLayout.enabled", false);
user_pref("browser.newtabpage.activity-stream.sov.amp.allocation", "100, 100, 100");
user_pref("browser.newtabpage.activity-stream.sov.enabled", false);
user_pref("browser.newtabpage.activity-stream.sov.frecency.allocation", "0, 0, 0");
user_pref("browser.newtabpage.activity-stream.sov.frecency.exposure", false);
user_pref("browser.newtabpage.activity-stream.sov.name", "SOV-20251122215625");
user_pref("browser.newtabpage.activity-stream.widgets.enabled", false);
user_pref("browser.newtabpage.activity-stream.widgets.maximized", false);
user_pref("browser.newtabpage.activity-stream.widgets.system.maximized", false);
user_pref("browser.translations.quickAction.enabled", false);
user_pref("dap.ohttp.hpke", "https://dap-09-3.api.divviup.org/ohttp-configs");
user_pref("dap.ohttp.relayURL", "https://mozilla-ohttp-dap.mozilla.fastly-edge.com/");
user_pref("devtools.jsonview.size-profiler.enabled", false);
user_pref("dom.about-blank-ckeditor-hack.disabled-domains", "");
user_pref("dom.about-blank-ckeditor-hack.enabled", false);
user_pref("dom.jsipc.send_typed", false);
user_pref("dom.navigation.api.internal_method_tracker", false);
user_pref("dom.quotaManager.temporaryStorage.clearNonPersistedZeroUsageOrigins", false);
user_pref("dom.quotaManager.temporaryStorage.initialOriginAccessTimeOffsetSec", 0);
user_pref("dom.quotaManager.temporaryStorage.maxOriginsToClearDuringCleanup", 150);
user_pref("dom.selection.exclude_non_selectable_nodes", false);
user_pref("extensions.webextensions.base-content-security-policy.v3-with-localhost", "script-src 'self' 'wasm-unsafe-eval' http://localhost:* http://127.0.0.1:*;");
user_pref("first-startup.category-tasks-enabled", true);
user_pref("gfx.canvas.accelerated.max-data-shmems", 400);
user_pref("intl.hyphenation-alias.ku-*", "ku");
user_pref("javascript.options.experimental.iterator_sequencing", true);
user_pref("layout.abspos.fragmentainer-aware-positioning.enabled", false);
user_pref("layout.css.anchor-positioning.position-try-order.enabled", false);
user_pref("layout.css.attr.enabled", false);
user_pref("layout.css.scroll-behavior.same-physics-as-user-input", false);
user_pref("layout.css.scroll-snap.damping-ratio", "1.0");
user_pref("layout.css.scroll-snap.spring-constant", "250.0");
user_pref("mathml.operator_dictionary_accent.disabled", false);
user_pref("media.video-queue.hw-accel-size", 3);
user_pref("network.buffer.default_size", 65536);
user_pref("network.http.http3.fallback_to_h2_on_error", true);
user_pref("network.http.http3.pmtud", false);
user_pref("network.http.rcwn.race_with_non_ssd", true);
user_pref("network.lna.prompt.timeout", 300000);
user_pref("network.trr_ui.fallback_was_checked", true);
user_pref("places.frecency.pages.halfLifeDays", 30);
user_pref("places.frecency.pages.highWeight", 100);
user_pref("places.frecency.pages.interactions.manyKeypresses", 50);
user_pref("places.frecency.pages.interactions.maxVisitGapSeconds", 120);
user_pref("places.frecency.pages.interactions.viewTimeIfManyKeypressesSeconds", 20);
user_pref("places.frecency.pages.interactions.viewTimeSeconds", 60);
user_pref("places.frecency.pages.lowWeight", 20);
user_pref("places.frecency.pages.mediumWeight", 50);
user_pref("places.frecency.pages.numSampledVisits", 10);
user_pref("places.frecency.pages.veryHighWeight", 200);
user_pref("places.semanticHistory.supportedRegions", "[["AU",["en-*"]],["CA",["en-*"]],["GB",["en-*"]],["IE",["en-*"]],["NZ",["en-*"]],["PH",["en-*"]],["US",["en-*"]]]");
user_pref("privacy.trackingprotection.harmfuladdon.enabled", true);
user_pref("security.webauthn.allow_with_certificate_override", false);
user_pref("services.sync.prefs.sync.privacy.trackingprotection.harmfuladdon.enabled", true);
user_pref("urlclassifier.features.harmfuladdon.blocklistTables", "harmfuladdon-block-digest256");
user_pref("urlclassifier.features.harmfuladdon.entitylistTables", "harmfuladdon-entitylist-digest256");
user_pref("widget.support-xdg-config", true);
```
### removed, renamed or hidden in 147.0:
```js
user_pref("accessibility.windows.suppress-after-clipboard-copy", 2);
user_pref("accessibility.windows.suppress-for-snap-layout", 2);
user_pref("apz.android.chrome_fling_physics.friction", "0.015");
user_pref("apz.android.chrome_fling_physics.inflexion", "0.35");
user_pref("apz.android.chrome_fling_physics.stop_threshold", "0.1");
user_pref("apz.mac.enable_double_tap_zoom_touchpad_gesture", true);
user_pref("apz.windows.check_for_pan_gesture_conversion", true);
user_pref("apz.windows.force_disable_direct_manipulation", false);
user_pref("apz.windows.use_direct_manipulation", true);
user_pref("browser.display.windows.non_native_menus", 2);
user_pref("browser.newtabpage.activity-stream.discoverystream.spoc-topsites-positions", 2);
user_pref("browser.newtabpage.activity-stream.discoverystream.spocTopsitesAdTypes", "");
user_pref("browser.newtabpage.activity-stream.discoverystream.spocTopsitesPlacement.enabled", true);
user_pref("browser.newtabpage.activity-stream.discoverystream.spocTopsitesZoneIds", "");
user_pref("browser.newtabpage.activity-stream.feeds.trendingsearchfeed", true);
user_pref("browser.newtabpage.activity-stream.system.trendingSearch.enabled", false);
user_pref("browser.newtabpage.activity-stream.trendingSearch.defaultSearchEngine", "Google");
user_pref("browser.newtabpage.activity-stream.trendingSearch.enabled", true);
user_pref("browser.newtabpage.activity-stream.trendingSearch.variant", "");
user_pref("browser.search.suggest.ohttp.enabled", true);
user_pref("browser.search.suggest.ohttp.featureGate", false);
user_pref("browser.tabs.documentchannel.parent-controlled", false);
user_pref("browser.topsites.contile.sov.enabled", true);
user_pref("browser.urlbar.quicksuggest.dataCollection.enabled", false);
user_pref("devtools.selfxss.count", 0);
user_pref("devtools.toolbox.selectedTool", "inspector");
user_pref("dom.events.asyncClipboard.clipboardItem", true);
user_pref("dom.events.asyncClipboard.readText", true);
user_pref("dom.keyboardevent.dispatch_during_composition", true);
user_pref("dom.text_fragments.create_text_fragment.enabled", true);
user_pref("dom.webnotifications.icon_encoding_utf8.enabled", true);
user_pref("extensions.cookie.rejectWhenInvalid", true);
user_pref("gfx.android.rgb16.force", false);
user_pref("gfx.canvas.remote.use-draw-image-fast-path-d3d", true);
user_pref("gfx.compositor.gpu-migration", 1);
user_pref("gfx.core-animation.tint-opaque", false);
user_pref("gfx.direct3d11.allow-keyed-mutex", true);
user_pref("gfx.direct3d11.break-on-error", false);
user_pref("gfx.direct3d11.enable-debug-layer", false);
user_pref("gfx.direct3d11.reuse-decoder-device", true);
user_pref("gfx.direct3d11.reuse-decoder-device-force-enabled", false);
user_pref("gfx.direct3d11.sleep-on-create-device", 0);
user_pref("gfx.direct3d11.use-double-buffering", false);
user_pref("gfx.use-iosurface-textures", false);
user_pref("gfx.use-mutex-on-present", false);
user_pref("gfx.use-surfacetexture-textures", false);
user_pref("gfx.webrender.software.d3d11", true);
user_pref("gfx.webrender.software.d3d11.upload-mode", 4);
user_pref("gl.allow-high-power", true);
user_pref("gl.ignore-dx-interop2-blacklist", false);
user_pref("identity.fxaccounts.migrateToDevEdition", false);
user_pref("identity.fxaccounts.oauth.enabled", true);
user_pref("image.avif.enabled", true);
user_pref("intl.hyphenation-alias.kmr-*", "kmr");
user_pref("layers.d3d11.enable-blacklist", true);
user_pref("layers.d3d11.force-warp", false);
user_pref("layers.iosurfaceimage.recycle-limit", 15);
user_pref("layout.css.grid-multi-pass-track-sizing.enabled", true);
user_pref("layout.css.iframe-embedder-prefers-color-scheme.content.enabled", true);
user_pref("layout.css.scroll-behavior.damping-ratio", "1.0");
user_pref("layout.css.scroll-behavior.spring-constant", "250.0");
user_pref("network.auth.confirmAuth.enabled", false);
user_pref("network.dns.native_https_timeout_android", 20000);
user_pref("network.dns.native_https_timeout_mac_msec", 5000);
user_pref("prompts.modalType.confirmAuth", 2);
user_pref("security.webauthn.enable_macos_passkeys", true);
user_pref("webgl.dxgl.enabled", false);
user_pref("webgl.dxgl.needs-finish", false);
user_pref("webgl.prefer-16bpp", false);
user_pref("widget.android.use-surfacecontrol", false);
user_pref("widget.window-transforms.disabled", false);
```
### changed in 147.0:
```js
user_pref("browser.contextual-services.contextId.rotation-in-days", 3); // 7
user_pref("browser.newtabpage.activity-stream.support.url", "https://support.mozilla.org/1/firefox/147.0/Linux/en-US/new-tab"); // https://support.mozilla.org/1/firefox/146.0/Linux/en-US/new-tab
user_pref("browser.safebrowsing.provider.google5.enabled", true); // false
user_pref("browser.safebrowsing.provider.mozilla.lists", "base-track-digest256,mozstd-trackwhite-digest256,google-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256,base-email-track-digest256,content-email-track-digest256,consent-manager-track-digest256,anti-fraud-track-digest256,harmfuladdon-block-digest256,harmfuladdon-entitylist-digest256"); // base-track-digest256,mozstd-trackwhite-digest256,google-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256,base-email-track-digest256,content-email-track-digest256,consent-manager-track-digest256,anti-fraud-track-digest256
user_pref("browser.tabs.dragDrop.multiselectStacking", true); // false
user_pref("dom.keyboardevent.init_key_event.enabled_in_addons", false); // true
user_pref("dom.navigation.webidl.enabled", true); // false
user_pref("dom.storage_access.headers.enabled", true); // false
user_pref("gfx.webrender.precise-conic-gradients-swgl", true); // false
user_pref("gfx.webrender.precise-radial-gradients-swgl", true); // false
user_pref("javascript.options.inlining_bytecode_max_length", 140); // 130
user_pref("javascript.options.use_js_microtask_queue", true); // false
user_pref("layout.css.anchor-positioning.enabled", true); // false
user_pref("layout.css.module-scripts.enabled", true); // false
user_pref("network.http.dictionaries.enable", true); // false
user_pref("network.http.rcwn.enabled", false); // true
user_pref("network.trr.retry_on_recoverable_errors", false); // true
```
# 148.0
130 diffs (63 new, 42 gone, 25 different)
### new in 148.0:
```js
user_pref("browser.ai.control.default", "available");
user_pref("browser.ai.control.linkPreviewKeyPoints", "default");
user_pref("browser.ai.control.pdfjsAltText", "default");
user_pref("browser.ai.control.sidebarChatbot", "default");
user_pref("browser.ai.control.smartTabGroups", "default");
user_pref("browser.ai.control.translations", "default");
user_pref("browser.aiwindow.apiKey", "");
user_pref("browser.aiwindow.chatStore.loglevel", "Error");
user_pref("browser.aiwindow.endpoint", "https://mlpa-prod-prod-mozilla.global.ssl.fastly.net/v1");
user_pref("browser.aiwindow.firstrun.autoAdvanceMS", 3000);
user_pref("browser.aiwindow.firstrun.modelChoice", "");
user_pref("browser.aiwindow.memories", false);
user_pref("browser.aiwindow.memoriesLogLevel", "Warn");
user_pref("browser.aiwindow.model", "qwen3-235b-a22b-instruct-2507-maas");
user_pref("browser.aiwindow.preferences.enabled", false);
user_pref("browser.crashReports.onDemand", true);
user_pref("browser.newtabpage.activity-stream.externalComponents.enabled", true);
user_pref("browser.newtabpage.activity-stream.feeds.externalcomponentsfeed", true);
user_pref("browser.newtabpage.activity-stream.search.useHandoffComponent", true);
user_pref("browser.newtabpage.activity-stream.widgets.system.weatherForecast.enabled", false);
user_pref("browser.newtabpage.activity-stream.widgets.weatherForecast.enabled", true);
user_pref("browser.newtabpage.activity-stream.widgets.weatherForecast.interaction", false);
user_pref("browser.preferences.aiControls", true);
user_pref("browser.tabs.remoteSVGIconDecoding", false);
user_pref("dom.documentpip.enabled", false);
user_pref("dom.event.pointer.rawupdate.movement.enabled", true);
user_pref("dom.execCommand.paste.enabled", true);
user_pref("dom.forms.html_color_picker.enabled", false);
user_pref("dom.lazy-loading.margin.bottom", "600.0");
user_pref("dom.lazy-loading.margin.bottom.percentage", false);
user_pref("dom.lazy-loading.margin.is-scroll", true);
user_pref("dom.lazy-loading.margin.left", "600.0");
user_pref("dom.lazy-loading.margin.left.percentage", false);
user_pref("dom.lazy-loading.margin.right", "600.0");
user_pref("dom.lazy-loading.margin.right.percentage", false);
user_pref("dom.lazy-loading.margin.top", "600.0");
user_pref("dom.lazy-loading.margin.top.percentage", false);
user_pref("dom.location.ancestorOrigins.enabled", true);
user_pref("dom.serializer.includeCommonAncestor.enabled", false);
user_pref("dom.viewTransitions.cross-document.enabled", false);
user_pref("editor.htmleditor.inputevent.hack.no_dispatch_after_compositionend", "");
user_pref("editor.htmleditor.inputevent.hack.no_dispatch_after_compositionend.addl", "");
user_pref("editor.htmleditor.inputevent.hack.no_dispatch_before_compositionend", "");
user_pref("editor.htmleditor.inputevent.hack.no_dispatch_before_compositionend.addl", "");
user_pref("editor.texteditor.inputevent.hack.no_dispatch_after_compositionend", "");
user_pref("editor.texteditor.inputevent.hack.no_dispatch_after_compositionend.addl", "");
user_pref("editor.texteditor.inputevent.hack.no_dispatch_before_compositionend", "");
user_pref("editor.texteditor.inputevent.hack.no_dispatch_before_compositionend.addl", "");
user_pref("gfx.color_management.hdr_video", true);
user_pref("gfx.color_management.hdr_video_assume_rec2020_uses_pq", true);
user_pref("gfx.webrender.dcomp-texture-overlay-win", false);
user_pref("gfx.webrender.overlay-hdr", true);
user_pref("javascript.options.experimental.capture_oom_stack_trace", false);
user_pref("javascript.options.experimental.joint_iteration", true);
user_pref("javascript.options.experimental.legacy_regexp", false);
user_pref("javascript.options.force_preloader_active", false);
user_pref("javascript.options.wasm_custom_page_sizes", false);
user_pref("network.dns.mru_to_tail", false);
user_pref("network.mimesniff.non_standard_html_comment", true);
user_pref("nimbus.rollouts.enabled", true);
user_pref("privacy.webrtc.preview.testGumDelayMs", 0);
user_pref("security.qwacs.enabled", false);
user_pref("services.sync.prefs.sync.nimbus.rollouts.enabled", true);
```
### removed, renamed or hidden in 148.0:
```js
user_pref("browser.crashReports.crashPull", false);
user_pref("browser.ipProtection.domainExclusions", "");
user_pref("browser.ipProtection.domainInclusions", "");
user_pref("browser.ipProtection.exceptionsMode", "all");
user_pref("browser.newtabpage.activity-stream.discoverystream.sections.cards.thumbsUpDown.enabled", true);
user_pref("browser.newtabpage.activity-stream.discoverystream.thumbsUpDown.enabled", false);
user_pref("browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar", true);
user_pref("browser.translations.newSettingsUI.enable", false);
user_pref("dom.cookieStore.extra.enabled", false);
user_pref("dom.cookieStore.manager.enabled", true);
user_pref("dom.image-lazy-loading.root-margin.bottom", "600.0");
user_pref("dom.image-lazy-loading.root-margin.bottom.percentage", false);
user_pref("dom.image-lazy-loading.root-margin.left", "600.0");
user_pref("dom.image-lazy-loading.root-margin.left.percentage", false);
user_pref("dom.image-lazy-loading.root-margin.right", "600.0");
user_pref("dom.image-lazy-loading.root-margin.right.percentage", false);
user_pref("dom.image-lazy-loading.root-margin.top", "600.0");
user_pref("dom.image-lazy-loading.root-margin.top.percentage", false);
user_pref("dom.security.sanitizer.logging", false);
user_pref("extensions.manifestV3.enabled", true);
user_pref("network.http.http2.push_priority_update", false);
user_pref("network.predictor.doing-tests", false);
user_pref("network.predictor.enable-prefetch", false);
user_pref("network.predictor.enabled", false);
user_pref("network.predictor.max-resources-per-entry", 100);
user_pref("network.predictor.max-uri-length", 500);
user_pref("network.predictor.page-degradation.day", 0);
user_pref("network.predictor.page-degradation.max", 50);
user_pref("network.predictor.page-degradation.month", 10);
user_pref("network.predictor.page-degradation.week", 5);
user_pref("network.predictor.page-degradation.year", 25);
user_pref("network.predictor.preconnect-min-confidence", 90);
user_pref("network.predictor.prefetch-force-valid-for", 10);
user_pref("network.predictor.prefetch-min-confidence", 100);
user_pref("network.predictor.prefetch-rolling-load-count", 10);
user_pref("network.predictor.preresolve-min-confidence", 60);
user_pref("network.predictor.subresource-degradation.day", 1);
user_pref("network.predictor.subresource-degradation.max", 100);
user_pref("network.predictor.subresource-degradation.month", 25);
user_pref("network.predictor.subresource-degradation.week", 10);
user_pref("network.predictor.subresource-degradation.year", 50);
user_pref("network.trr.confirmation_telemetry_enabled", true);
```
### changed in 148.0:
```js
user_pref("browser.anchor_color.dark", "#00CADB"); // #8C8CFF
user_pref("browser.backup.backup-retry-limit", 10); // 100
user_pref("browser.newtabpage.activity-stream.discoverystream.personalization.enabled", false); // true
user_pref("browser.newtabpage.activity-stream.discoverystream.spocs.personalized", false); // true
user_pref("browser.newtabpage.activity-stream.support.url", "https://support.mozilla.org/1/firefox/148.0/Linux/en-US/new-tab"); // https://support.mozilla.org/1/firefox/147.0/Linux/en-US/new-tab
user_pref("browser.newtabpage.activity-stream.telemetry.privatePing.enabled", true); // false
user_pref("browser.newtabpage.activity-stream.telemetry.privatePing.redactNewtabPing.enabled", true); // false
user_pref("browser.tabs.groups.smart.suggestOtherTabsMethod", "LOGISTIC_REGRESSION"); // NEAREST_NEIGHBOR
user_pref("dap.ohttp.hpke", "gAAgJSO22Y3HKzRSese15JtQVuuFfOIcTrZ56lQ5kDQwS0oABAABAAE"); // https://dap-09-3.api.divviup.org/ohttp-configs
user_pref("dom.about-blank-ckeditor-hack.enabled", true); // false
user_pref("dom.jsipc.send_typed", true); // false
user_pref("dom.navigation.navigationRateLimit.count", 1000); // 200
user_pref("dom.security.sanitizer.enabled", true); // false
user_pref("dom.security.trusted_types.enabled", true); // false
user_pref("dom.timeout.defer_during_load.force-disable", "*.usps.com, *.nvidia.com, *.fedex.com, *.msci.com, *.the-saleroom.com, *.si.com, *.heinnie.com"); // *.usps.com, *.nvidia.com, *.fedex.com, *.msci.com, *.the-saleroom.com
user_pref("geo.provider.network.url", "https://www.googleapis.com/geolocation/v1/geolocate?key=%GOOGLE_LOCATION_SERVICE_API_KEY%&solution_channel=%OS%"); // https://www.googleapis.com/geolocation/v1/geolocate?key=%GOOGLE_LOCATION_SERVICE_API_KEY%
user_pref("gfx.webrender.precise-linear-gradients-swgl", true); // false
user_pref("javascript.options.asmjs", false); // true
user_pref("javascript.options.wasm_branch_hinting", true); // false
user_pref("layout.css.anchor-positioning.position-try-order.enabled", true); // false
user_pref("layout.css.basic-shape-shape.enabled", true); // false
user_pref("network.http.dictionaries.enable", false); // true
user_pref("pdfjs.enableAltText", true); // false
user_pref("pdfjs.enableAltTextModelDownload", false); // true
user_pref("pdfjs.enableGuessAltText", false); // true
```
# 149.0
179 diffs (93 new, 56 gone, 30 different)
### new in 149.0:
```js
user_pref("accessibility.ariaNotify.enabled", false);
user_pref("browser.ipProtection.autoRestoreEnabled", false);
user_pref("browser.ipProtection.bandwidth.enabled", true);
user_pref("browser.ipProtection.bandwidthThreshold", 0);
user_pref("browser.ipProtection.egressLocationEnabled", false);
user_pref("browser.ipProtection.everOpenedPanel", false);
user_pref("browser.ipProtection.hasUpgraded", false);
user_pref("browser.ipProtection.siteExceptionsHintsEnabled", true);
user_pref("browser.ipProtection.userEnableCount", 0);
user_pref("browser.newtabpage.activity-stream.activationWindow.variant", "");
user_pref("browser.newtabpage.activity-stream.discoverystream.sections.layout", "7-double-row-2-ad");
user_pref("browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar", true);
user_pref("browser.newtabpage.activity-stream.privacyInfo.url", "https://support.mozilla.org/1/firefox/149.0/Linux/en-US/sponsor-privacy");
user_pref("browser.newtabpage.activity-stream.selfLoading.enabled", false);
user_pref("browser.preferences.aiControls.showUnavailable", false);
user_pref("browser.safebrowsing.globalCache.enabled", false);
user_pref("browser.safebrowsing.realTime.enabled", false);
user_pref("browser.safebrowsing.realTime.simulation.cacheTTLSec", 300);
user_pref("browser.safebrowsing.realTime.simulation.enabled", false);
user_pref("browser.safebrowsing.realTime.simulation.hitProbability", 100);
user_pref("browser.safebrowsing.realTime.simulation.noiseEntryCount", 4);
user_pref("browser.smartwindow.apiKey", "");
user_pref("browser.smartwindow.chatHistory.loglevel", "Error");
user_pref("browser.smartwindow.chatStore.loglevel", "Error");
user_pref("browser.smartwindow.enabled", false);
user_pref("browser.smartwindow.endpoint", "https://mlpa-prod-prod-mozilla.global.ssl.fastly.net/v1");
user_pref("browser.smartwindow.firstrun.autoAdvanceMS", 3000);
user_pref("browser.smartwindow.firstrun.hasCompleted", false);
user_pref("browser.smartwindow.firstrun.modelChoice", "");
user_pref("browser.smartwindow.memories", true);
user_pref("browser.smartwindow.memoriesLogLevel", "Warn");
user_pref("browser.smartwindow.model", "");
user_pref("browser.smartwindow.preferences.endpoint", "");
user_pref("browser.smartwindow.smartbarMentions.loglevel", "Error");
user_pref("browser.tabs.splitview.hasUsed", false);
user_pref("browser.urlbar.amp.minKeywordLength", 0);
user_pref("browser.urlbar.mdn.minKeywordLength", 0);
user_pref("browser.urlbar.mentions.maxResults", 5);
user_pref("browser.urlbar.quicksuggest.ampTopPickUseNovaIconSize", false);
user_pref("devtools.application.selectedSidebar", "service-workers");
user_pref("devtools.application.sessionHistory.enabled", false);
user_pref("devtools.debugger.features.stylesheets-in-debugger", false);
user_pref("devtools.webconsole.codemirrorNext", false);
user_pref("distribution.about", "Mozilla Firefox Official Build");
user_pref("distribution.id", "mozilla-official");
user_pref("distribution.version", "1.0");
user_pref("dom.about-blank-gwt-hack.disabled-domains", "");
user_pref("dom.about-blank-gwt-hack.enabled", true);
user_pref("dom.about-blank-ze-hack.disabled-domains", "");
user_pref("dom.about-blank-ze-hack.enabled", true);
user_pref("dom.element.popoverhint.enabled", true);
user_pref("dom.forms.alpha.enabled", false);
user_pref("dom.forms.colorspace.enabled", true);
user_pref("dom.media.pseudo-classes.enabled", false);
user_pref("dom.quotaManager.temporaryStorage.clearTemporaryOriginsUsingOriginCache", true);
user_pref("dom.script_loader.experimental.navigation_cache.check_memory_pressure", true);
user_pref("dom.security.credentialmanagement.digital.enabled", false);
user_pref("dom.select.customizable_select.enabled", false);
user_pref("dom.webnotifications.block_if_on_safebrowsing", true);
user_pref("dom.window.named_properties_object.legacy_own_property_keys", false);
user_pref("extensions.webcompat.enable_interventions", true);
user_pref("extensions.webcompat.enable_shims", true);
user_pref("extensions.webextensions.allow_executeScript_in_moz_extension", true);
user_pref("extensions.webextensions.legacyStructuredCloneBehavior", true);
user_pref("extensions.webextensions.pageActionIconDarkModeFilter.enabled", true);
user_pref("gfx.canvas.max-area", 1073741823);
user_pref("javascript.options.objectfuse_for_all_protos", true);
user_pref("javascript.options.wasm_compact_imports", false);
user_pref("layout.css.color-mix-multi-color.enabled", false);
user_pref("layout.css.text-box.enabled", false);
user_pref("mathml.adjust_default_lspace_rspace_for_positive_scriptlevel.disabled", true);
user_pref("media.captureStream.enabled", true);
user_pref("mousewheel.allow_scrolling_more_than_one_page", false);
user_pref("network.backgroundfilesaver.async_copy_chunk_size", 1048576);
user_pref("network.dns.high_priority_dispatch", true);
user_pref("network.http.fallback_to_net_parse_ct", true);
user_pref("network.http.http3.0rtt_timeout", 5000);
user_pref("network.socket.allowed_nonlocal_domains", "");
user_pref("network.socket.prioritize_runnables", true);
user_pref("network.trr.allow_default_http3_first", false);
user_pref("network.trr.force_http3_first", false);
user_pref("network.trr.high_priority_events", true);
user_pref("network.trr.parse_on_socket_thread", true);
user_pref("pdfjs.enableSplitMerge", false);
user_pref("permissions.desktop-notification.telemetry.siteCategories", "{"facebook.com":"social","instagram.com":"social","twitter.com":"social","x.com":"social","tiktok.com":"social","linkedin.com":"social","reddit.com":"social","pinterest.com":"social","snapchat.com":"social","tumblr.com":"social","slack.com":"chat_communication","discord.com":"chat_communication","teams.microsoft.com":"chat_communication","zoom.us":"chat_communication","whatsapp.com":"chat_communication","telegram.org":"chat_communication","messenger.com":"chat_communication","skype.com":"chat_communication","signal.org":"chat_communication","viber.com":"chat_communication","mail.google.com":"email","gmail.com":"email","outlook.com":"email","outlook.live.com":"email","mail.yahoo.com":"email","yahoo.com":"email","protonmail.com":"email","aol.com":"email","icloud.com":"email","zoho.com":"email","youtube.com":"media_streaming","netflix.com":"media_streaming","twitch.tv":"media_streaming","hulu.com":"media_streaming","disneyplus.com":"media_streaming","hbomax.com":"media_streaming","primevideo.com":"media_streaming","crunchyroll.com":"media_streaming","paramountplus.com":"media_streaming","spotify.com":"media_streaming","soundcloud.com":"media_streaming","pandora.com":"media_streaming","tv.apple.com":"media_streaming","steampowered.com":"gaming","steamcommunity.com":"gaming","store.epicgames.com":"gaming","roblox.com":"gaming","playstation.com":"gaming","xbox.com":"gaming","nintendo.com":"gaming","battle.net":"gaming","itch.io":"gaming","chess.com":"gaming","calendar.google.com":"calendar","outlook.live.com":"calendar","calendar.yahoo.com":"calendar","calendar.com":"calendar","drive.google.com":"productivity_collaboration","docs.google.com":"productivity_collaboration","sheets.google.com":"productivity_collaboration","office.com":"productivity_collaboration","onedrive.live.com":"productivity_collaboration","dropbox.com":"productivity_collaboration","box.com":"productivity_collaboration","notion.so":"productivity_collaboration","trello.com":"productivity_collaboration","asana.com":"productivity_collaboration","monday.com":"productivity_collaboration","atlassian.com":"productivity_collaboration","gitlab.com":"productivity_collaboration","bitbucket.org":"productivity_collaboration","miro.com":"productivity_collaboration","figma.com":"productivity_collaboration","cnn.com":"news_publishers","nytimes.com":"news_publishers","bbc.com":"news_publishers","theguardian.com":"news_publishers","washingtonpost.com":"news_publishers","foxnews.com":"news_publishers","reuters.com":"news_publishers","apnews.com":"news_publishers","bloomberg.com":"news_publishers","wsj.com":"news_publishers","usatoday.com":"news_publishers","nbcnews.com":"news_publishers","abcnews.go.com":"news_publishers","cbsnews.com":"news_publishers","npr.org":"news_publishers","time.com":"news_publishers","newsweek.com":"news_publishers","politico.com":"news_publishers","huffpost.com":"news_publishers","buzzfeednews.com":"news_publishers"}");
user_pref("privacy.trackingprotection.content.annotation.enabled", false);
user_pref("privacy.trackingprotection.content.annotation.test_list_urls", "");
user_pref("privacy.trackingprotection.content.protection.enabled", false);
user_pref("privacy.trackingprotection.content.protection.test_list_urls", "");
user_pref("privacy.trackingprotection.content.testing", false);
user_pref("security.pdf_signature_verification.enable_test_trust_anchors", false);
user_pref("urlclassifier.globalCacheTable", "goog-globalcache-proto");
user_pref("widget.wayland.force-move-to-rect", false);
```
### removed, renamed or hidden in 149.0:
```js
user_pref("browser.aiwindow.apiKey", "");
user_pref("browser.aiwindow.chatStore.loglevel", "Error");
user_pref("browser.aiwindow.enabled", false);
user_pref("browser.aiwindow.endpoint", "https://mlpa-prod-prod-mozilla.global.ssl.fastly.net/v1");
user_pref("browser.aiwindow.firstrun.autoAdvanceMS", 3000);
user_pref("browser.aiwindow.firstrun.modelChoice", "");
user_pref("browser.aiwindow.memories", false);
user_pref("browser.aiwindow.memoriesLogLevel", "Warn");
user_pref("browser.aiwindow.model", "qwen3-235b-a22b-instruct-2507-maas");
user_pref("browser.aiwindow.preferences.enabled", false);
user_pref("browser.ipProtection.panelOpenCount", 0);
user_pref("browser.ipProtection.variant", "");
user_pref("browser.ml.smartAssist.apiKey", "");
user_pref("browser.ml.smartAssist.enabled", false);
user_pref("browser.ml.smartAssist.endpoint", "");
user_pref("browser.ml.smartAssist.model", "");
user_pref("browser.ml.smartAssist.overrideNewTab", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.personalization.enabled", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.personalization.modelKeys", "nb_model_arts_and_entertainment, nb_model_autos_and_vehicles, nb_model_beauty_and_fitness, nb_model_blogging_resources_and_services, nb_model_books_and_literature, nb_model_business_and_industrial, nb_model_computers_and_electronics, nb_model_finance, nb_model_food_and_drink, nb_model_games, nb_model_health, nb_model_hobbies_and_leisure, nb_model_home_and_garden, nb_model_internet_and_telecom, nb_model_jobs_and_education, nb_model_law_and_government, nb_model_online_communities, nb_model_people_and_society, nb_model_pets_and_animals, nb_model_real_estate, nb_model_reference, nb_model_science, nb_model_shopping, nb_model_sports, nb_model_travel");
user_pref("browser.newtabpage.activity-stream.discoverystream.personalization.override", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.recs.personalized", false);
user_pref("browser.newtabpage.activity-stream.discoverystream.refinedCardsLayout.enabled", true);
user_pref("browser.newtabpage.activity-stream.discoverystream.spocs.personalized", false);
user_pref("browser.newtabpage.activity-stream.feeds.recommendationprovider", true);
user_pref("browser.newtabpage.activity-stream.weather.placement", "header");
user_pref("browser.tabs.context.close-duplicate.enabled", true);
user_pref("browser.tabs.dragDrop.multiselectStacking", true);
user_pref("browser.urlbar.switchTabs.searchAllContainers", true);
user_pref("cookiebanners.ui.desktop.cfrVariant", 0);
user_pref("devtools.target-switching.server.enabled", true);
user_pref("dom.arena_allocator.enabled", true);
user_pref("dom.customHighlightAPI.enabled", true);
user_pref("dom.hidden_until_found.enabled", true);
user_pref("dom.keyboardevent.init_key_event.enabled", false);
user_pref("dom.storage_access.forward_declared.enabled", false);
user_pref("dom.storage_access.forward_declared.lifetime", 900);
user_pref("dom.w3c_pointer_events.getcoalescedevents_only_in_securecontext", true);
user_pref("extensions.webcompat.useScriptingAPI", true);
user_pref("gfx.webrender.precise-conic-gradients", true);
user_pref("gfx.webrender.precise-conic-gradients-swgl", true);
user_pref("gfx.webrender.precise-radial-gradients", true);
user_pref("gfx.webrender.precise-radial-gradients-swgl", true);
user_pref("image.jxl.enabled", false);
user_pref("javascript.options.experimental.dictionary_teleporting", true);
user_pref("javascript.options.experimental.math_sumprecise", true);
user_pref("javascript.options.experimental.shadow_realms", false);
user_pref("javascript.options.experimental.uint8array_base64", true);
user_pref("javascript.options.experimental.upsert", true);
user_pref("javascript.options.use_js_microtask_queue", true);
user_pref("javascript.options.wasm_lazy_tiering_for_gc", true);
user_pref("media.gmp-manager.cert.requireBuiltIn", true);
user_pref("media.gmp-manager.checkContentSignature", true);
user_pref("media.mediasource.mp4.enabled", true);
user_pref("media.mediasource.webm.enabled", true);
user_pref("network.standard_content_type_parsing.response_headers", true);
user_pref("privacy.sanitize.useOldClearHistoryDialog", false);
```
### changed in 149.0:
```js
user_pref("browser.ipProtection.features.siteExceptions", true); // false
user_pref("browser.newtabpage.activity-stream.discoverystream.imageProxy.enabled", true); // false
user_pref("browser.newtabpage.activity-stream.discoverystream.sections.customizeMenuPanel.enabled", true); // false
user_pref("browser.newtabpage.activity-stream.discoverystream.sections.personalization.enabled", true); // false
user_pref("browser.newtabpage.activity-stream.support.url", "https://support.mozilla.org/1/firefox/149.0/Linux/en-US/new-tab"); // https://support.mozilla.org/1/firefox/148.0/Linux/en-US/new-tab
user_pref("browser.safebrowsing.provider.google5.lists", "goog-badbinurl-proto,goog-downloadwhite-proto,goog-phish-proto,googpub-phish-proto,goog-malware-proto,goog-unwanted-proto,goog-harmful-proto,goog-globalcache-proto"); // goog-badbinurl-proto,goog-downloadwhite-proto,goog-phish-proto,googpub-phish-proto,goog-malware-proto,goog-unwanted-proto,goog-harmful-proto
user_pref("browser.safebrowsing.provider.mozilla.lists", "base-track-digest256,mozstd-trackwhite-digest256,google-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256,base-email-track-digest256,content-email-track-digest256,consent-manager-track-digest256,anti-fraud-track-digest256,harmful-addon-block-digest256,harmful-addon-entitylist-digest256"); // base-track-digest256,mozstd-trackwhite-digest256,google-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256,base-email-track-digest256,content-email-track-digest256,consent-manager-track-digest256,anti-fraud-track-digest256,harmfuladdon-block-digest256,harmfuladdon-entitylist-digest256
user_pref("browser.search.widget.new", true); // false
user_pref("browser.tabs.remoteSVGIconDecoding", true); // false
user_pref("browser.tabs.splitView.enabled", true); // false
user_pref("browser.urlbar.trustPanel.featureGate", true); // false
user_pref("dom.closewatcher.enabled", true); // false
user_pref("dom.input.showPicker_datalist.enabled", true); // false
user_pref("dom.reporting.enabled", true); // false
user_pref("dom.reporting.header.enabled", true); // false
user_pref("dom.timeout.defer_during_load.force-disable", "*.usps.com, *.nvidia.com, *.fedex.com, *.msci.com, *.the-saleroom.com, *.si.com, *.heinnie.com, *.hyattinclusivecollection.com"); // *.usps.com, *.nvidia.com, *.fedex.com, *.msci.com, *.the-saleroom.com, *.si.com, *.heinnie.com
user_pref("extensions.formautofill.addresses.supportedCountries", "US,CA,GB,FR,DE,BR,ES,JP,AT,IN,IT,PL,AU"); // US,CA,GB,FR,DE,BR,ES,JP
user_pref("extensions.openPopupWithoutUserGesture.enabled", true); // false
user_pref("gfx.canvas.max-size", 65535); // 32767
user_pref("gfx.max-texture-size", 65535); // 32767
user_pref("mathml.font_family_math.enabled", true); // false
user_pref("network.dnsCacheEntries", 1600); // 800
user_pref("network.lna.etp.enabled", true); // false
user_pref("network.ssl_tokens_cache_records_per_entry", 10); // 2
user_pref("pdfjs.enableHWA", true); // false
user_pref("security.certerrors.felt-privacy-v1", true); // false
user_pref("sidebar.revamp.round-content-area", true); // false
user_pref("urlclassifier.disallow_completions", "goog-downloadwhite-digest256,base-track-digest256,mozstd-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256,base-email-track-digest256,content-email-track-digest256,consent-manager-track-digest256,anti-fraud-track-digest256,harmful-addon-block-digest256"); // goog-downloadwhite-digest256,base-track-digest256,mozstd-trackwhite-digest256,content-track-digest256,mozplugin-block-digest256,mozplugin2-block-digest256,ads-track-digest256,social-track-digest256,analytics-track-digest256,base-fingerprinting-track-digest256,content-fingerprinting-track-digest256,base-cryptomining-track-digest256,content-cryptomining-track-digest256,fanboyannoyance-ads-digest256,fanboysocial-ads-digest256,easylist-ads-digest256,easyprivacy-ads-digest256,adguard-ads-digest256,social-tracking-protection-digest256,social-tracking-protection-facebook-digest256,social-tracking-protection-linkedin-digest256,social-tracking-protection-twitter-digest256,base-email-track-digest256,content-email-track-digest256,consent-manager-track-digest256,anti-fraud-track-digest256
user_pref("urlclassifier.features.harmfuladdon.blocklistTables", "harmful-addon-block-digest256"); // harmfuladdon-block-digest256
user_pref("urlclassifier.features.harmfuladdon.entitylistTables", ""); // harmfuladdon-entitylist-digest256
```
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