ToDo: diffs FF132-FF133

[earthlng]

FF133 release date: Nov. 26th 2024

FF133 release notes
FF133 for developers
FF133 security advisories

---

119 diffs ( 72 new, 18 gone, 29 different )

new in v133.0:

pref("browser.theme.native-theme", false);
pref("browser.urlbar.quicksuggest.mlEnabled", false);
pref("browser.urlbar.yelp.mlEnabled", false);
pref("dom.security.https_first_exception_lifetime", 604800000);
pref("dom.security.https_first_for_custom_ports", true);
pref("network.dns.https_rr.check_record_with_cname", false);
pref("network.dns.skip_ipv6_when_no_addresses", false);
pref("network.url.simple_uri_unknown_schemes", "");
pref("network.url.simple_uri_unknown_schemes_enabled", true);
pref("reader.debug", false);
pref("remote.events.async.enabled", false);
pref("security.certerrors.felt-privacy-v1", false);
pref("security.pki.cert_trust_cache_size", 128);
pref("security.pki.crlite_timestamps_for_coverage", 1);
pref("sidebar.backupState", "{}");
pref("widget.windows.mica", false);

changed in v133.0:

pref("browser.contentblocking.features.strict", "tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,emailTP,emailTPPrivate,lvl2,rp,rpTop,ocsp,qps,qpsPBM,fpp,fppPrivate,3pcd,btp"); // prev: "tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,emailTP,emailTPPrivate,lvl2,rp,rpTop,ocsp,qps,qpsPBM,fpp,fppPrivate,3pcd"
pref("dom.media.webcodecs.image-decoder.enabled", true); // prev: false
pref("dom.popup_maximum", -1); // prev: 20
pref("dom.push.maxRecentMessageIDsPerSubscription", 100); // prev: 10
pref("dom.shadowdom.new_caretPositionFromPoint_behavior.enabled", false); // prev: true
pref("gfx.canvas.accelerated", true); // prev: false
pref("gfx.direct2d.disabled", true); // prev: false
pref("layout.css.accent-color.min-contrast-ratio", "2.4"); // prev: "3.0"
pref("layout.css.prefixes.transforms", true); // prev: false
pref("network.cookie.useServerTime", true); // prev: false
pref("network.dns.port_prefixed_qname_https_rr", true); // prev: false
pref("network.http.http2.send_NO_RFC7540_PRI", false); // prev: true
pref("network.http.http3.disable_when_third_party_roots_found", true); // prev: false
pref("network.url.useDefaultURI", true); // prev: false
pref("pdfjs.enableHWA", false); // prev: true
pref("privacy.window.maxInnerHeight", 900); // prev: 1000
pref("privacy.window.maxInnerWidth", 1400); // prev: 1000
pref("security.pki.crlite_channel", "all"); // prev: "specified"

---

ignore

click me for details

==NEW

pref("accessibility.enable_all_cache_domains", false);
pref("browser.ml.checkForMemory", false);
pref("browser.ml.defaultModelMemoryUsage", 2);
pref("browser.ml.maximumMemoryPressure", 80);
pref("browser.ml.minimumPhysicalMemory", 4);
pref("browser.ml.queueWaitInterval", 1);
pref("browser.ml.queueWaitTimeout", 60);
pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.ctaCopy", "");
pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.ctaUrl", "");
pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.defaultCategoryTitle", "");
pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.enabled", true);
pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.fakespot.footerCopy", "");
pref("browser.newtabpage.activity-stream.newtabAdSize.variant-a", false);
pref("browser.newtabpage.activity-stream.newtabAdSize.variant-b", false);
pref("browser.profiles.profile-name.updated", false);
pref("browser.tabs.groups.dragOverThresholdPercent", 20);
pref("browser.urlbar.deduplication.enabled", false);
pref("browser.urlbar.deduplication.thresholdDays", 7);
pref("browser.urlbar.focusContentDocumentOnEsc", false);
pref("browser.urlbar.nerThreshold", "0.5");
pref("browser.urlbar.quicksuggest.rankingMode", "default");
pref("browser.urlbar.suggest.quickactions", true);
pref("devtools.debugger.show-content-scripts", false);
pref("dom.cache.databaseInitialization.pauseOnIOThreadMs", 0);
pref("dom.element.dialog.toggle_events.enabled", true);
pref("dom.fs.databaseInitialization.pauseOnIOThreadMs", 0);
pref("dom.fs.testing", false);
pref("dom.indexedDB.databaseInitialization.pauseOnIOThreadMs", 0);
pref("dom.quotaManager.artificialFailure.categories", 0);
pref("dom.quotaManager.artificialFailure.errorCode", 0);
pref("dom.quotaManager.artificialFailure.probability", 0);
pref("dom.quotaManager.originInitialization.pauseOnIOThreadMs", 0);
pref("dom.quotaManager.temporaryStorage.lazyOriginInitialization", false);
pref("dom.quotaManager.temporaryStorage.triggerOriginInitializationInBackground", false);
pref("dom.serverEvents.defaultReconnectionTime", 5000);
pref("dom.simpledb.databaseInitialization.pauseOnIOThreadMs", 0);
pref("dom.storage.databaseInitialization.pauseOnIOThreadMs", 0);
pref("dom.storage.enable_migration_from_unsupported_legacy_implementation", false);
pref("dom.storage.requestFinalization.pauseOnDOMFileThreadMs", 0);
pref("javascript.options.dom_alloc_site", true);
pref("javascript.options.experimental.uint8array_base64", true);
pref("javascript.options.wasm_call_ref_inlining", true);
pref("javascript.options.wasm_call_ref_inlining_percent", 50);
pref("javascript.options.wasm_direct_inlining", true);
pref("javascript.options.wasm_inlining_level", 5);
pref("javascript.options.wasm_lazy_tiering", false);
pref("javascript.options.wasm_lazy_tiering_for_gc", false);
pref("javascript.options.wasm_lazy_tiering_level", 5);
pref("javascript.options.wasm_lazy_tiering_synchronous", false);
pref("layers.gpu-process.extend_ipc_reply_timeout_ms", 20000);
pref("layout.css.has-slotted-selector.enabled", false);
pref("media.gmp-manager.chromium-update-url", "https://update.googleapis.com/service/update2/crx?response=redirect&x=id%3D%GUID%%26uc&acceptformat=crx3&updaterversion=999");
pref("media.gmp-widevinecdm.chromium-guid", "oimompecagnajdejgnnjijobebaeigek");
pref("media.gmp-widevinecdm.force-chromium-beta", false);
pref("media.gmp-widevinecdm.force-chromium-update", false);
pref("media.wakelock.audio.delay-releasing.ms", 10000);

==REMOVED, RENAMED or HIDDEN

pref("devtools.inspector.rule-view.starting-style", true);
pref("dom.element.popover.enabled", true);
pref("dom.server-events.default-reconnection-time", 5000);
pref("editor.block_inline_check.use_computed_style", true);
pref("extensions.script_about_blank_without_permission", false);
pref("javascript.options.experimental.iterator_helpers", true);
pref("javascript.options.wasm_experimental_callRef_inlining", true);
pref("javascript.options.wasm_experimental_compile_pipeline", false);
pref("javascript.options.wasm_experimental_direct_inlining", true);
pref("javascript.options.wasm_experimental_inline_call_ref_threshold", 1);
pref("javascript.options.wasm_experimental_inlining_level", 5);
pref("javascript.options.wasm_experimental_tiering_level", 5);
pref("network.url.simple_uri_schemes", "");
pref("network.url.some_schemes_bypass_defaultURI_fallback", true);
pref("places.forgetThisSite.clearByBaseDomain", true);
pref("security.certerrors.recordEventTelemetry", true);
pref("security.protectionspopup.recordEventTelemetry", true);
pref("signon.management.page.fileImport.enabled", true);

==CHANGED

pref("browser.ml.chat.prompts.1", "{\"id\":\"explain\",\"l10nId\":\"genai-prompts-explain\"}"); // prev: "{\"id\":\"simplify\",\"l10nId\":\"genai-prompts-simplify\"}"
pref("browser.ml.chat.prompts.2", "{\"id\":\"simplify\",\"l10nId\":\"genai-prompts-simplify\",\"targeting\":\"channel=='nightly'\"}"); // prev: "{\"id\":\"quiz\",\"l10nId\":\"genai-prompts-quiz\",\"targeting\":\"!provider|regExpMatch('gemini')\"}"
pref("browser.ml.chat.prompts.3", "{\"id\":\"quiz\",\"l10nId\":\"genai-prompts-quiz\",\"targeting\":\"!provider|regExpMatch('gemini') || region == 'US'\"}"); // prev: "{\"id\":\"explain\",\"l10nId\":\"genai-prompts-explain\",\"targeting\":\"channel=='nightly'\"}"
pref("browser.ml.chat.shortcuts.custom", true); // prev: false
pref("browser.newtabpage.activity-stream.discoverystream.contextualContent.feeds", "need_to_know, fakespot"); // prev: "need_to_know"
pref("browser.newtabpage.activity-stream.discoverystream.spocs.startupCache.enabled", false); // prev: true
pref("browser.newtabpage.activity-stream.support.url", "https://support.mozilla.org/1/firefox/133.0/WINNT/en-US/new-tab"); // prev: "https://support.mozilla.org/1/firefox/132.0/WINNT/en-US/new-tab"
pref("devtools.debugger.features.codemirror-next", true); // prev: false
pref("dom.fetchKeepalive.enabled", true); // prev: false
pref("dom.fetchKeepalive.request_limit_per_origin", 250); // prev: 30
pref("dom.fetchKeepalive.total_request_limit", 500); // prev: 100

[earthlng]

some bugzilla tickets

• accessibility.enable_all_cache_domains
  Bug 1921917: Create startup pref to enable all cache domains,

• browser.contentblocking.features.strict
  Bug 1907390 - Add BounceTrackingProtection prefs to ETP Strict configuration.
  Bug 1918037 - Enable blocking third-party cookies in ETP strict.

• browser.ml.chat.prompts.1
  Bug 1911949 - Change the order of chat prompts with explain moved up for release
  Bug 1907350 - Expose genai-settings-chat-title and other chatbot strings for localization
  Bug 1895813 - Add telemetry for chat interactions and state
  Bug 1894998 - Add prefs to control chat, provider, prompts

• browser.ml.chat.prompts.2
  Bug 1911949 - Change the order of chat prompts with explain moved up for release
  Bug 1907350 - Expose genai-settings-chat-title and other chatbot strings for localization
  Bug 1895497 - Update chatbot providers and featuregate with more appropriate configuration for initial nightly
  Bug 1895813 - Add telemetry for chat interactions and state
  Bug 1894998 - Add prefs to control chat, provider, prompts

• browser.ml.chat.prompts.3
  Bug 1911949 - Change the order of chat prompts with explain moved up for release
  Bug 1907350 - Expose genai-settings-chat-title and other chatbot strings for localization

• browser.ml.chat.shortcuts.custom
  Bug 1920778 - Enable custom prompts by default with multiline autosize
  Bug 1910005 - Expose chat shortcuts pref as part of experimental subitem
  Bug 1905750 - Display shortcuts on text selection

• browser.ml.checkForMemory
  Bug 1924499 - Add an API to check if we can run inference

• browser.ml.defaultModelMemoryUsage
  Bug 1885253 - make sure we don't ask for 2GiB in the CI by default

• browser.ml.maximumMemoryPressure
  Bug 1924499 - Add an API to check if we can run inference

• browser.ml.minimumPhysicalMemory
  Bug 1885253 - make sure we don't ask for 2GiB in the CI by default
  Bug 1924499 - Add an API to check if we can run inference

• browser.ml.queueWaitInterval
  Bug 1924499 - Add an API to check if we can run inference

• browser.ml.queueWaitTimeout
  Bug 1924499 - Add an API to check if we can run inference

• browser.newtabpage.activity-stream.newtabAdSize.variant-a
  Bug 1926056 - Newtab new ad size and UI variants

• browser.newtabpage.activity-stream.newtabAdSize.variant-b
  Bug 1926056 - Newtab new ad size and UI variants

• browser.profiles.profile-name.updated
  Bug 1886003 - Create about:newprofile page.

• browser.tabs.groups.dragOverThresholdPercent
  Bug 1908438 - Drag and drop support for creating a group.

• browser.urlbar.deduplication.enabled
  Bug 1389229 - Deduplicate urlbar history results that only differ by their URL fragment.

• browser.urlbar.deduplication.thresholdDays
  Bug 1389229 - Deduplicate urlbar history results that only differ by their URL fragment.

• browser.urlbar.focusContentDocumentOnEsc
  Bug 1929014 - Disable new ESC behavior in Address Bar for Firefox 133.
  Bug 1086524 - Focus window on Esc in address bar

• browser.urlbar.nerThreshold
  Bug 1922591 - MLSuggest for yelp, weather intent classification and NER location

• browser.urlbar.quicksuggest.mlEnabled
  Bug 1926381 - Integrate MLSuggest with UrlbarProviderQuickSuggest and implement Yelp ML suggestions.

• browser.urlbar.quicksuggest.rankingMode
  Bug 1923187: part 2 - Add experimental ranking for Merino suggestions

• browser.urlbar.suggest.quickactions
  Bug 1922570 - Show global actions on seperate row from heuristic.

• browser.urlbar.yelp.mlEnabled
  Bug 1926381 - Integrate MLSuggest with UrlbarProviderQuickSuggest and implement Yelp ML suggestions.

• devtools.debugger.features.codemirror-next
  Bug 1904489 - [devtools] Enable Codemirror 6 by default

• devtools.debugger.show-content-scripts
  Bug 1698068 - [devtools] Show a setting in Debugger's Source Tree to show/hide extension content scripts.

• devtools.inspector.rule-view.starting-style
  Bug 1907049 - [devtools] Remove devtools.inspector.rule-view.starting-style pref.
  Bug 1905035 - [devtools] Display @starting-style rules in the Inspector.
  Bug 1905035 - [devtools] Display @starting-style rules in the Inspector. a=dmeehan.
  Bug 1906228 - [devtools] Momentarily stop displaying starting-style rules until bug is fixed.

• dom.cache.databaseInitialization.pauseOnIOThreadMs
  Bug 1919507 - Cache: Add support for pausing QM IO thread after finishing database initialization;

• dom.element.dialog.toggle_events.enabled
  Bug 1876762 - Implement togggle events for Dialog show/showModal/close

• dom.element.popover.enabled
  Bug 1927138 - Remove popover prefs.

• dom.fetchKeepalive.enabled
  Bug 1924458 - increase fetch keepalive request limit quota.
  Bug 1923044 - enable fetch keepalive feature by default.
  Bug 1906952 - enable fetch keepalive for nightly and early beta users.

• dom.fetchKeepalive.request_limit_per_origin
  Bug 1924458 - increase fetch keepalive request limit quota.
  Bug 1906952 - enable fetch keepalive for nightly and early beta users.

• dom.fetchKeepalive.total_request_limit
  Bug 1924458 - increase fetch keepalive request limit quota.
  Bug 1906952 - enable fetch keepalive for nightly and early beta users.

• dom.fs.databaseInitialization.pauseOnIOThreadMs
  Bug 1919556 - FS: Add support for pausing QM IO thread after finishing database initialization;

• dom.fs.testing
  Bug 1919556 - FS: Add a pref for testing;

• dom.indexedDB.databaseInitialization.pauseOnIOThreadMs
  Bug 1919493 - IDB: Add support for pausing QM IO thread after finishing database initialization;

• dom.media.webcodecs.image-decoder.enabled
  Bug 1923755 - Ship WebCodecs ImageDecoder and VideoFrame to release.

• dom.popup_maximum
  Bug 1911736 - Enable dom.popup.experimental on Nightly,
  Bug 1917381 - disable the ancient dom.popup_maximum pref by default,

• dom.push.maxRecentMessageIDsPerSubscription
  Bug 1928868 - Adjust maxRecentMessageIDsPerSubscription to 100 a=dmeehan
  Bug 1928868 - Adjust maxRecentMessageIDsPerSubscription to 100 a=RyanVM
  Bug 1777492 - Merge geckoview-prefs.js and mobile.js

• dom.quotaManager.artificialFailure.categories
  Bug 1928028 - QM: Add suppport for triggering artificial failures;

• dom.quotaManager.artificialFailure.errorCode
  Bug 1928028 - QM: Add suppport for triggering artificial failures;

• dom.quotaManager.artificialFailure.probability
  Bug 1928028 - QM: Add suppport for triggering artificial failures;

• dom.quotaManager.originInitialization.pauseOnIOThreadMs
  Bug 1867997 - Add support for pausing QM IO thread after finishing origin initialization;

• dom.quotaManager.temporaryStorage.lazyOriginInitialization
  Bug 1867997 - Add support for conditional lazy initialization of origins;

• dom.quotaManager.temporaryStorage.triggerOriginInitializationInBackground
  Bug 1867997 - Add support for continuous background initialization of all temporary origins collected during temporary storage initialization;

• dom.security.https_first_exception_lifetime
  Bug 1921226 - Change expiration time for HTTPS upgrade exceptions

• dom.security.https_first_for_custom_ports
  Bug 1877935 - Enable HTTPS-First for non-default ports

• dom.serverEvents.defaultReconnectionTime
  Bug 1921627 - Fix WPT eventsource-constructor-empty-url.any.worker.html,

• dom.simpledb.databaseInitialization.pauseOnIOThreadMs
  Bug 1919428 - SDB: Add support for pausing QM IO thread after finishing database initialization;

• dom.storage.databaseInitialization.pauseOnIOThreadMs
  Bug 1919550 - LSNG: Add support for pausing QM IO thread after finishing database initialization;

• dom.storage.enable_migration_from_unsupported_legacy_implementation
  Bug 1925782 - LSNG: Disable migration from archived database;
  Bug 1925782 - LSNG: Add a pref for migration from archived database;

• dom.storage.requestFinalization.pauseOnDOMFileThreadMs
  Bug 1919788 - LSNG: Add support for pausing DOM File thread during request finalization;

• editor.block_inline_check.use_computed_style
  Bug 1922457 - Get rid of editor.block_inline_check.use_computed_style pref

• extensions.script_about_blank_without_permission
  Bug 1856071 - Remove extensions.script_about_blank_without_permission pref,

• gfx.canvas.accelerated
  Bug 1910138 - Enable Accelerated Canvas2D on Windows.

• gfx.direct2d.disabled
  Bug 1910138 - Enable Accelerated Canvas2D on Windows.

• javascript.options.dom_alloc_site
  Bug 1892764 - Add AllocSites for DOM Wrappers on their creation

• javascript.options.experimental.iterator_helpers
  Bug 1910717 - Remove pref for iterator helpers

• javascript.options.experimental.uint8array_base64
  Bug 1917885 - [Outreachy] Ship Uint8Array to/from base64 and hex;

• javascript.options.wasm_call_ref_inlining
  Bug 1921216 - wasm speculative inlining: track multiple targets per call-ref callsite.
  Bug 1913114 - wasm: Remove 'experimental' from inlining prefs.

• javascript.options.wasm_call_ref_inlining_percent
  Bug 1921216 - wasm speculative inlining: track multiple targets per call-ref callsite.

• javascript.options.wasm_direct_inlining
  Bug 1913114 - wasm: Remove 'experimental' from inlining prefs.

• javascript.options.wasm_experimental_callRef_inlining
  Bug 1913114 - wasm: Remove 'experimental' from inlining prefs.
  Bug 1911071 - part 1: reorganize lazy-tiering and inlining heuristics.

• javascript.options.wasm_experimental_compile_pipeline
  Bug 1913114 - wasm: Rename lazy tiering prefs and add pref that enables lazy tiering only for wasm-gc.

• javascript.options.wasm_experimental_direct_inlining
  Bug 1913114 - wasm: Remove 'experimental' from inlining prefs.
  Bug 1911071 - part 1: reorganize lazy-tiering and inlining heuristics.

• javascript.options.wasm_experimental_inline_call_ref_threshold
  Bug 1913114 - wasm: Remove 'experimental' from inlining prefs.

• javascript.options.wasm_experimental_inlining_level
  Bug 1913114 - wasm: Remove 'experimental' from inlining prefs.
  Bug 1911071 - part 1: reorganize lazy-tiering and inlining heuristics.

• javascript.options.wasm_experimental_tiering_level
  Bug 1913114 - wasm: Rename tiering aggressiveness pref and use it in our tests.
  Bug 1911071 - part 1: reorganize lazy-tiering and inlining heuristics.

• javascript.options.wasm_inlining_level
  Bug 1913114 - wasm: Remove 'experimental' from inlining prefs.

• javascript.options.wasm_lazy_tiering
  Bug 1913114 - wasm: Update tests for new flags, add a sync flag.
  Bug 1913114 - wasm: Rename tiering aggressiveness pref and use it in our tests.
  Bug 1913114 - wasm: Rename lazy tiering prefs and add pref that enables lazy tiering only for wasm-gc.

• javascript.options.wasm_lazy_tiering_for_gc
  Bug 1913114 - wasm: Rename lazy tiering prefs and add pref that enables lazy tiering only for wasm-gc.

• javascript.options.wasm_lazy_tiering_level
  Bug 1913114 - wasm: Rename tiering aggressiveness pref and use it in our tests.

• javascript.options.wasm_lazy_tiering_synchronous
  Bug 1913114 - wasm: Update tests for new flags, add a sync flag.

• layers.gpu-process.extend_ipc_reply_timeout_ms
  Bug 1922157 - Relax GPU process IPC reply timeout during calling WebRenderAPI::Create()

• layout.css.accent-color.min-contrast-ratio
  Bug 1924702 - Lower a bit WCAG min contrast ratio for white foreground.

• layout.css.has-slotted-selector.enabled
  Bug 1921747 - Implement :has-slotted pseudo

• layout.css.prefixes.transforms
  Bug 1886134 - Re-enable transform prefixes.

• media.gmp-manager.chromium-update-url
  Bug 1920197 - Add prefs to allow updating Widevine directly from the Chromium update service.

• media.gmp-widevinecdm.chromium-guid
  Bug 1920197 - Add prefs to allow updating Widevine directly from the Chromium update service.

• media.gmp-widevinecdm.force-chromium-beta
  Bug 1920197 - Add prefs to allow updating Widevine directly from the Chromium update service.

• media.gmp-widevinecdm.force-chromium-update
  Bug 1920197 - Add prefs to allow updating Widevine directly from the Chromium update service.

• media.wakelock.audio.delay-releasing.ms
  Bug 1908258 - part1 : delay audio wakelock releasing.

• network.cookie.useServerTime
  Bug 1923872 - Enable server-time to compute the max-age,

• network.dns.https_rr.check_record_with_cname
  Bug 1916418 - Ignore the svcb record when the targetName doesn't match cname,

• network.dns.port_prefixed_qname_https_rr
  Bug 1860038 - Enable network.dns.port_prefixed_qname_https_rr

• network.dns.skip_ipv6_when_no_addresses
  Bug 1122907 - Don't do IPv6 DNS when the device doesn't have any non-local IPv6 addresses

• network.http.http2.send_NO_RFC7540_PRI
  Bug 1930122 - Set network.http.http2.send_NO_RFC7540_PRI to false a=dmeehan
  Bug 1915134 - Add pref to enable Extensible Prioritization Scheme without sending SETTINGS_NO_RFC7540_PRIORITIES

• network.http.http3.disable_when_third_party_roots_found
  Bug 1929368 - Squashed patch for beta uplift, a=dmeehan
  Bug 1929093 - Disable network.http.http3.disable_when_third_party_roots_found, a=dmeehan
  Bug 1925014 - Disallow HTTP/3 when third party root is found,
  Bug 1925014 - Disallow HTTP/3 when third party root is found. a=RyanVM

• network.url.simple_uri_schemes
  Bug 1889988 - Added remote settings input to defaultUri bypass list

• network.url.simple_uri_unknown_schemes
  Bug 1889988 - Added remote settings input to defaultUri bypass list

• network.url.simple_uri_unknown_schemes_enabled
  Bug 1889988 - Added remote settings input to defaultUri bypass list

• network.url.some_schemes_bypass_defaultURI_fallback
  Bug 1889988 - Added remote settings input to defaultUri bypass list

• network.url.useDefaultURI
  Bug 1889988 - Re-enable defaultURI as parser for unknown schemes and update tests.

• pdfjs.enableHWA
  Bug 1905864 - Generate a PDF.js default-prefs file that can be used directly in mozilla-central.
  Bug 1904655 - Enable hardware acceleration in pdf.js on Windows

• places.forgetThisSite.clearByBaseDomain
  Bug 1914585 - Remove pref 'places.forgetThisSite.clearByBaseDomain'.

• privacy.window.maxInnerHeight
  Bug 1556002 - Update initial window size and letterboxing stepping.

• privacy.window.maxInnerWidth
  Bug 1556002 - Update initial window size and letterboxing stepping.

• reader.debug
  Bug 1902693 - add a debug pref for reader mode,

• remote.events.async.enabled
  Bug 1904665 - [remote] Prepare the Remote Agent code base for parent process event dispatching.

• security.certerrors.felt-privacy-v1
  Bug 1873514 - Update about:neterror appearance and strings.

• security.certerrors.recordEventTelemetry
  Bug 1920562 - Remove JS uses of Services.telemetry.setEventRecordingEnabled

• security.pki.cert_trust_cache_size
  Bug 1922074 - add a trust cache to certificate verification

• security.pki.crlite_channel
  Bug 1923918 - use the experimental CRLite filter channel on Nightly.

• security.pki.crlite_timestamps_for_coverage
  Bug 1926414 - add a pref to make CRLite coverage checks more strict.

• security.protectionspopup.recordEventTelemetry
  Bug 1920562 - Remove JS uses of Services.telemetry.setEventRecordingEnabled

• sidebar.backupState
  Bug 1908019 - Store sidebar UI state in a pref that acts as a fallback

• signon.management.page.fileImport.enabled
  Bug 1869153, remove file import preference signon.management.page.fileImport.enabled and supporting code since it is enabled by default,

• widget.windows.mica
  Bug 1764822 - Implement mica titlebar behind a (default off) pref.