ToDo: diffs FF96-FF97

[earthlng]

FF97 is scheduled for release Feb. 8th

FF97 release notes
FF97 for developers
FF97 security advisories

---

86 diffs ( 54 new, 14 gone, 18 different )

new in v97.0:

• 0706 pref("network.proxy.allow_bypass", true); 1733481 now a static pref - 51cc372
  • added in FF95 as a hidden pref - see this
• 7006 pref("dom.securecontext.allowlist_onions", false); 1744006 - replaces "whitelist" pref

removed, renamed or hidden in v97.0:

• 7006 pref("dom.securecontext.whitelist_onions", false); - 1744006 - replaced by "allowlist" pref - 35b31a2

changed in v97.0:

• pref("dom.vr.enabled", false); // prev: true 1750902 - 8503411
• FYI: 🎉 Introducing Site Isolation in Firefox
  • pref("fission.autostart", true); // prev: false
  • pref("fission.autostart.session", true); // prev: false
• FYI: for visibility (in FF95-96 diffs they were flipped to true)
  • pref("network.cookie.sameSite.laxByDefault", false); // prev: true
  • pref("network.cookie.sameSite.noneRequiresSecure", false); // prev: true
  • pref("network.cookie.sameSite.schemeful", false); // prev: true

---

ignore

click me for details

==NEW

pref("browser.newtabpage.activity-stream.discoverystream.compactGrid.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.compactImages.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.descLines", 3);
pref("browser.newtabpage.activity-stream.discoverystream.editorsPicksHeader.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.essentialReadsHeader.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.hideDescriptions.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.imageGradient.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.newSponsoredLabel.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.readTime.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.titleLines", 3);
pref("browser.shell.setDefaultPDFHandler", false);
pref("browser.urlbar.quicksuggest.allowPositionInSuggestions", true);
pref("browser.urlbar.suggest.remotetab", true);
pref("browser.vpn_promo.disallowed_regions", "ae,by,cn,cu,iq,ir,kp,om,ru,sd,sy,tm,tr,ua");
pref("browser.vpn_promo.enabled", true);
pref("devtools.netmonitor.features.newEditAndResend", false);
pref("dom.screenorientation.allow-lock", false);
pref("dom.svg.pathSeg.enabled", false);
pref("dom.webmidi.gated", true);
pref("editor.background_color", "#FFFFFF");
pref("extensions.pocket.refresh.emailButton.enabled", false);
pref("extensions.pocket.refresh.layout.enabled", false);
pref("gfx.webrender.dcomp-video-overlay-win", false);
pref("intl.hyphenation-alias.as", "bn");
pref("intl.hyphenation-alias.as-*", "bn");
pref("intl.hyphenation-alias.bn-*", "bn");
pref("intl.hyphenation-alias.gu-*", "gu");
pref("intl.hyphenation-alias.hi-*", "hi");
pref("intl.hyphenation-alias.kn-*", "kn");
pref("intl.hyphenation-alias.ml-*", "ml");
pref("intl.hyphenation-alias.mr", "hi");
pref("intl.hyphenation-alias.mr-*", "hi");
pref("intl.hyphenation-alias.or-*", "or");
pref("intl.hyphenation-alias.pa-*", "pa");
pref("intl.hyphenation-alias.ta-*", "ta");
pref("intl.hyphenation-alias.te-*", "te");
pref("layout.css.hyphenate-character.enabled", false);
pref("layout.css.named-pages.enabled", false);
pref("layout.oopif_activity_grace_period_ms", 1000);
pref("layout.throttled_frame_rate", 1);
pref("layout.visibility.min-recompute-interval-ms", 1000);
pref("media.audio.playbackrate.muting_threshold", 8);
pref("media.audio.playbackrate.soundtouch_overlap_ms", 8);
pref("media.audio.playbackrate.soundtouch_seekwindow_ms", 15);
pref("media.audio.playbackrate.soundtouch_sequence_ms", 10);
pref("media.videocontrols.picture-in-picture.video-toggle.visibility-threshold", "0.9");
pref("media.webrtc.software_encoder.fallback", true);
pref("network.auth.choose_most_secure_challenge", true);
pref("print.cups.enum_dests_timeout_ms", 150);
pref("print.show_page_setup_menu", false);
pref("widget.disable-swipe-tracker", true);
pref("widget.non-native-theme.win11.scrollbar.force-overlay-style", false);

==REMOVED or HIDDEN

pref("browser.proton.enabled", true);
pref("browser.search.update.interval", 21600);
pref("browser.search.update.log", false);
pref("devtools.debugger.tabsBlackBoxed", "[]");
pref("dom.ipc.plugins.sandbox-level.default", 0);
pref("dom.ipc.plugins.sandbox-level.flash", 3);
pref("dom.quotaManager.temporaryStorage.chunkSize", 10240);
pref("fission.openNonFissionWindowOption", false);
pref("layers.acceleration.draw-fps", false);
pref("layout.css.touch_action.enabled", true);
pref("media.videocontrols.picture-in-picture.allow-multiple", true);
pref("print.tab_modal.enabled", true);
pref("privacy.antitracking.cacheStorageAllowedForWindow", true);

==CHANGED

pref("app.update.url.manual", "https://www.mozilla.org/%LOCALE%/firefox/new?reason=manual-update"); // prev: "https://www.mozilla.org/%LOCALE%/firefox/"
pref("browser.startup.upgradeDialog.enabled", false); // prev: true
pref("devtools.every-frame-target.enabled", true); // prev: false
pref("devtools.webconsole.input.context", true); // prev: false
pref("dom.w3c_pointer_events.dispatch_by_pointer_messages", true); // prev: false
pref("editor.hr_element.allow_to_delete_from_following_line", true); // prev: false
pref("layout.css.cascade-layers.enabled", true); // prev: false
pref("layout.css.d-property.enabled", true); // prev: false
pref("layout.css.scrollbar-gutter.enabled", true); // prev: false
pref("media.webrtc.platformencoder", true); // prev: false
pref("network.url.max-length", 33554432); // prev: 0
pref("ui.key.textcontrol.prefer_native_key_bindings_over_builtin_shortcut_key_definitions", true); // prev: false

[earthlng]

some bugzilla tickets

• browser.newtabpage.activity-stream.discoverystream.compactGrid.enabled
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.newtabpage.activity-stream.discoverystream.compactImages.enabled
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.newtabpage.activity-stream.discoverystream.descLines
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.newtabpage.activity-stream.discoverystream.editorsPicksHeader.enabled
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.newtabpage.activity-stream.discoverystream.essentialReadsHeader.enabled
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.newtabpage.activity-stream.discoverystream.hideDescriptions.enabled
  Bug 1747969 - Fixing Pocket newtab descriptions for remote layouts.

• browser.newtabpage.activity-stream.discoverystream.imageGradient.enabled
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.newtabpage.activity-stream.discoverystream.newSponsoredLabel.enabled
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.newtabpage.activity-stream.discoverystream.readTime.enabled
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.newtabpage.activity-stream.discoverystream.titleLines
  Bug 1746649 - Pocket newtab some new layout prefs

• browser.proton.enabled
  Bug 1719939 - remove proton pref from static pref list and its last C++ consumer,
  Bug 1699250 - Use proton dark theme in-content

• browser.search.update.interval
  Bug 1730875 - Add documentation for search related preferences.

• browser.search.update.log
  Bug 1730875 - Add documentation for search related preferences.

• browser.shell.setDefaultPDFHandler
  Bug 1743914 - Part 2: Allow to experiment with setting Firefox as default PDF handler on Windows 10+.

• browser.startup.upgradeDialog.enabled
  Bug 1738073 - Remove Colorways onboarding when MR2 Colorways expire
  Bug 1740623 - Adjust MR2 upgrade spotlight content
  Bug 1740819 - Turn off MR2 onboarding in Fx95
  Bug 1697222 - Show upgrade dialog without conflicting with existing default browser prompt.

• browser.urlbar.quicksuggest.allowPositionInSuggestions
  Bug 1743711: Show allowed sponsored suggestions in second position.

• browser.urlbar.suggest.remotetab
  Bug 1746789 - Allow disabling remote tabs in the Urlbar without disabling tab sync.

• browser.vpn_promo.disallowed_regions
  Bug 1741741 - Avoid showing Mozilla VPN in unsupported countries

• browser.vpn_promo.enabled
  Bug 1741741 - Avoid showing Mozilla VPN in unsupported countries

• devtools.every-frame-target.enabled
  Bug 1731740 - [devtools] Enable EFT by default.
  Bug 1741808 - [devtools] Enable EFT on Nightly.
  Bug 1685500 - [devtools] Create target actors for all iframes.

• devtools.netmonitor.features.newEditAndResend
  Bug 1744759 - [devtools] Create a pref flag for the edit and resend panel.

• devtools.webconsole.input.context
  Bug 1731740 - [devtools] Enable EFT by default.

• dom.ipc.plugins.sandbox-level.default
  Bug 1742312 removed NPAPI related flags
  Bug 1722412 - Remove Mac Flash Sandboxing Prefs

• dom.ipc.plugins.sandbox-level.flash
  Bug 1742312 removed NPAPI related flags
  Bug 1722412 - Remove Mac Flash Sandboxing Prefs

• dom.quotaManager.temporaryStorage.chunkSize
  Bug 1735713 - Revamp temporary storage limits;

• dom.screenorientation.allow-lock
  Bug 1697647 - Add screen orientation lock api

• dom.securecontext.allowlist_onions
  Bug 1744006 - Replace dom.securecontext.whitelist_onions with dom.securecontext.allowlist_onions and dom.securecontext.whitelist with dom.securecontext.allowlist

• dom.securecontext.whitelist_onions
  Bug 1744006 - Replace dom.securecontext.whitelist_onions with dom.securecontext.allowlist_onions and dom.securecontext.whitelist with dom.securecontext.allowlist

• dom.svg.pathSeg.enabled
  Bug 1388931 - Unship SVGPathSeg APIs behind a preference.

• dom.vr.enabled
  Bug 1750902 - Disable dom.vr.enabled by default.

• dom.w3c_pointer_events.dispatch_by_pointer_messages
  Bug 1707075 - Enable dispatch_by_pointer_messages by default

• dom.webmidi.gated
  Bug 1742471 enforce addon gating of webmidi interfaces

• editor.background_color
  Bug 1745882 - Move all editor prefs in all.js to StaticPrefList.yaml

• editor.hr_element.allow_to_delete_from_following_line
  Bug 1745879 - Allow to delete <hr> element with a Backspace key press from next line of it

• extensions.pocket.refresh.emailButton.enabled
  Bug 1746027 - Save to Pocket refresh prefs and Nimbus implementation

• extensions.pocket.refresh.layout.enabled
  Bug 1746027 - Save to Pocket refresh prefs and Nimbus implementation

• fission.autostart
  Bug 1732358 - Part 4: Enable fission by default on non-android platforms,
  Bug 1674871: Unlock fission.autostart and allow to ride the trains.

• fission.openNonFissionWindowOption
  Bug 1661791 - Remove "New Non-Fission Window" menu item.

• gfx.webrender.dcomp-video-overlay-win
  Bug 1746065 - Use a static pref for dcomp overlay.

• intl.hyphenation-alias.as
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.as-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.bn-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.gu-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.hi-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.kn-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.ml-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.mr
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.mr-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.or-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.pa-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.ta-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• intl.hyphenation-alias.te-*
  Bug 1240277 - Add hyphenation patterns for Indic languages.

• layers.acceleration.draw-fps
  Bug 1745109 - Remove DiagnosticsD3D11

• layout.css.cascade-layers.enabled
  Bug 1699215 - Enable cascade layers everywhere.

• layout.css.d-property.enabled
  Bug 1744599 - Ship d property.

• layout.css.hyphenate-character.enabled
  Bug 1746187 - Add CSS support for the hyphenate-character property.

• layout.css.named-pages.enabled
  Bug 1741973 - Implement parsing of the page property

• layout.css.scrollbar-gutter.enabled
  Bug 1715112 Part 3 - Enable CSS scrollbar-gutter by default.
  Bug 1741774 - Support scrollbar-gutter in the style system.

• layout.css.touch_action.enabled
  Bug 1748174 - Remove touch-action pref.

• layout.oopif_activity_grace_period_ms
  Bug 1745869 - Grant 1s of activity to hidden OOPIF iframes.

• layout.throttled_frame_rate
  Bug 1746229 - Minor cleanups to the refresh driver.

• layout.visibility.min-recompute-interval-ms
  Bug 1746229 - Minor cleanups to the refresh driver.

• media.audio.playbackrate.muting_threshold
  Bug 1630569 - Change the limit at which audio is muted with high or low playback rates, and make it and other parameters configurable via prefs.

• media.audio.playbackrate.soundtouch_overlap_ms
  Bug 1630569 - Change the limit at which audio is muted with high or low playback rates, and make it and other parameters configurable via prefs.

• media.audio.playbackrate.soundtouch_seekwindow_ms
  Bug 1630569 - Change the limit at which audio is muted with high or low playback rates, and make it and other parameters configurable via prefs.

• media.audio.playbackrate.soundtouch_sequence_ms
  Bug 1630569 - Change the limit at which audio is muted with high or low playback rates, and make it and other parameters configurable via prefs.

• media.videocontrols.picture-in-picture.allow-multiple
  Bug 1739515 - Remove checks for multiple PiP windows pref
  Bug 1687477: Enable multiple Picture-in-Picture support by default
  Bug 1589680: Added support for multiple, concurrent Picture-in-Picture windows

• media.videocontrols.picture-in-picture.video-toggle.visibility-threshold
  Bug 1742585 - Add PiP toggle visibility threshold preference

• media.webrtc.platformencoder
  Bug 1747913 - turn on platform encoder and software fallback pref on all supported platforms.
  Bug 1654112 - Adapt VideoConduit to the new libwebrtc version.

• media.webrtc.software_encoder.fallback
  Bug 1747913 - turn on platform encoder and software fallback pref on all supported platforms.
  Bug 1726617 - p1: use video encoder fallback wrapper in WebRTC.

• network.auth.choose_most_secure_challenge
  Bug 650091 - Sort authentication challenges by safety rating

• network.cookie.sameSite.laxByDefault
  Bug 1751435 - sameSite=lax, noneRequiresSecure and samesiteSchemeful in early beta or earlier
  Bug 1617609: Enable sameSite=lax by default.

• network.cookie.sameSite.noneRequiresSecure
  Bug 1751435 - sameSite=lax, noneRequiresSecure and samesiteSchemeful in early beta or earlier
  Bug 1750264 - Disable cookie sameSite schemeful in Firefox 96.
  Bug 1617609: Enable sameSite=lax by default.

• network.cookie.sameSite.schemeful
  Bug 1751435 - sameSite=lax, noneRequiresSecure and samesiteSchemeful in early beta or earlier
  Bug 1750264 - Disable cookie sameSite schemeful in Firefox 96.
  Bug 1617609: Enable sameSite=lax by default.

• network.proxy.allow_bypass
  Bug 1733481 retry telemetry requests when a proxy fails

• network.url.max-length
  Bug 1741426 - Ship network.url.max-length = 32Mb dataURL limit to release

• print.cups.enum_dests_timeout_ms
  Bug 1747952 - Include discovered/network printers in the CUPS list, with a timeout.

• print.show_page_setup_menu
  Bug 1745465 - Add a pref to enable the Page Setup menu.

• print.tab_modal.enabled
  Bug 1702501 - Remove print.tab_modal.enabled pref and old frontend print preview code.

• privacy.antitracking.cacheStorageAllowedForWindow
  Bug 1745039 - Remove privacy.antitracking.cacheStorageAllowedForWindow pref.

• ui.key.textcontrol.prefer_native_key_bindings_over_builtin_shortcut_key_definitions
  Bug 1747326 - Enable the fix for bug 1743339 and bug 1743346 by default in the Beta/Release channels too
  Bug 1743346 - Make TextInputHandler::HandleEvent handle native key bindings first, then, our shortcut keys

• widget.disable-swipe-tracker
  Bug 1751124 - Disable SwipeTracker on Windows.

• widget.non-native-theme.win11.scrollbar.force-overlay-style
  Bug 1747618 - Implement non-overlay scrollbar style for Win11.