ToDo: diffs FF99-FF100

FF100 is scheduled for release May 3rd

FF100 release notes FF100 for developers FF100 security advisories

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104 diffs ( 46 new, 36 gone, 22 different )

new in v100.0:

• pref(“network.http.referer.disallowCrossSiteRelaxingDefault.top_navigation”, false); - 1734328 - https://github.com/arkenfox/user.js/pull/1423/commits/6a3b8a02793a986287a564b0af4b3b58dee7f186
• FYI
  • pref(“network.cookie.noPersistentStorage”, false); - 1675829 - do not use: this is for internal use e.g. background update agent
  • pref(“widget.windows.overlay-scrollbars.enabled”, true); // fyi for visibility: fingerprinting

removed, renamed or hidden in v100.0:

• 7009 - 1752621 - replaced by network.http2.http2* prefs - https://github.com/arkenfox/user.js/pull/1423/commits/c278dd2c42944943527568fa85fb4043c390ffc8
  • pref(“network.http.spdy.enabled”, true);
  • pref(“network.http.spdy.enabled.deps”, true);
  • pref(“network.http.spdy.enabled.http2”, true);
  • pref(“network.http.spdy.websockets”, true);

changed in v100.0:

• 7016 pref(“network.http.referer.disallowCrossSiteRelaxingDefault”, true); // prev: false - 1734328
• 1224 pref(“security.pki.crlite_mode”, 3); // prev: 1
• FYI
  • pref(“browser.contentblocking.features.strict”, “tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,lvl2,rp,rpTop,ocsp”);
  • // prev: “tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,lvl2,rp,ocsp”
  • New: rpTop - Restrict relaxing default referrer policy for top navigation
• FYI
  • pref(“intl.multilingual.aboutWelcome.languageMismatchEnabled”, true); // prev: false - 1740067 1755519
  • pref(“intl.multilingual.liveReload”, true); // prev: false … 22 years - 62174
  • pref(“network.process.enabled”, true); // prev: false FF66 1513057, FF100 1763207
  • pref(“widget.gtk.overlay-scrollbars.enabled”, true); // prev: false // // fyi for visibility: fingerprinting

---

ignore

click me for details

==NEW

pref("browser.history.wireframeAreaThreshold", 50);
pref("browser.promo.focus.disallowed_regions", "cn");
pref("browser.promo.focus.enabled", true);
pref("browser.shell.setDefaultPDFHandler.onlyReplaceBrowsers", true);
pref("dom.origin-trials.enabled", false);
pref("dom.origin-trials.test-key.enabled", false);
pref("editor.initialize_element_before_connect", true);
pref("extensions.formautofill.creditCards.heuristics.confidenceThreshold", "0.5");
pref("extensions.formautofill.creditCards.heuristics.mode", 0);
pref("extensions.InstallTrigger.enabled", true);
pref("extensions.InstallTriggerImpl.enabled", true);
pref("gfx.webgpu.force-enabled", false);
pref("gfx.webrender.dcomp-video-overlay-win-force-enabled", false);
pref("gfx.webrender.dcomp-video-vp-scaling-win", true);
pref("javascript.options.wasm_exceptions", true);
  // ^ https://github.com/WebAssembly/exception-handling
pref("layout.css.container-queries.enabled", false);
pref("layout.css.content-visibility.enabled", false);
  // ^ https://www.w3.org/TR/css-contain-2/#content-visibility
pref("layout.css.overflow-moz-hidden-unscrollable.enabled", true);
pref("layout.selectanchor", false);
pref("media.rdd-process.max-crashes", 2);
pref("media.webrtc.platformencoder.sw_mft", false);
pref("media.wmf.av1.enabled", true);
pref("media.wmf.no-copy-nv12-textures", false);
pref("network.dns.port_prefixed_qname_https_rr", false);
pref("network.http.http2.allow-push", true);
pref("network.http.http2.chunk-size", 16000);
pref("network.http.http2.coalesce-hostnames", true);
pref("network.http.http2.default-concurrent", 100);
pref("network.http.http2.default-hpack-buffer", 65536);
pref("network.http.http2.enable-hpack-dump", false);
pref("network.http.http2.enabled", true);
pref("network.http.http2.enabled.deps", true);
pref("network.http.http2.enforce-tls-profile", true);
pref("network.http.http2.persistent-settings", false);
pref("network.http.http2.ping-threshold", 58);
pref("network.http.http2.ping-timeout", 8);
pref("network.http.http2.pull-allowance", 12582912);
pref("network.http.http2.push-allowance", 131072);
pref("network.http.http2.send-buffer-size", 131072);
pref("network.http.http2.timeout", 170);
pref("network.http.http2.websockets", true);
pref("network.http.referer.disallowCrossSiteRelaxingDefault.pbmode.top_navigation", true);
pref("widget.windows.hide_cursor_when_typing", false);

==REMOVED, RENAMED or HIDDEN

pref("browser.contentblocking.state-partitioning.mvp.ui.enabled", true);
pref("browser.sessionstore.max_write_failures", 5);
pref("devtools.enabled", true);
pref("devtools.theme.show-auto-theme-info", true);
pref("dom.events.asyncClipboard", true);
pref("dom.IntersectionObserver.enabled", true);
pref("dom.IntersectionObserverExplicitDocumentRoot.enabled", true);
pref("dom.ipc.processCount.webLargeAllocation", 10);
pref("dom.largeAllocation.forceEnable", false);
pref("dom.largeAllocationHeader.enabled", true);
pref("general.useragent.forceVersion100", false);
pref("general.useragent.handledVersionExperimentEnrollment", false);
pref("layout.css.moz-locale-dir.content.enabled", false);
pref("layout.css.moz-lwtheme.content.enabled", false);
pref("mathml.xlink.disabled", true);
pref("network.http.spdy.allow-push", true);
pref("network.http.spdy.chunk-size", 16000);
pref("network.http.spdy.coalesce-hostnames", true);
pref("network.http.spdy.default-concurrent", 100);
pref("network.http.spdy.default-hpack-buffer", 65536);
pref("network.http.spdy.enable-hpack-dump", false);
pref("network.http.spdy.enforce-tls-profile", true);
pref("network.http.spdy.persistent-settings", false);
pref("network.http.spdy.ping-threshold", 58);
pref("network.http.spdy.ping-timeout", 8);
pref("network.http.spdy.pull-allowance", 12582912);
pref("network.http.spdy.push-allowance", 131072);
pref("network.http.spdy.send-buffer-size", 131072);
pref("network.http.spdy.timeout", 170);
pref("security.onecrl.maximum_staleness_in_seconds", 108000);
pref("security.secure_connection_icon_color_gray", true);
pref("widget.windows.overlay_scrollbars.enabled", false);

==CHANGED

pref("browser.contentblocking.report.vpn_regions", "as,at,be,ca,ch,de,es,fi,fr,gb,gg,ie,im,io,it,je,mp,my,nl,nz,pr,se,sg,uk,um,us,vg,vi"); // prev: "at,be,ca,ch,de,fr,ie,it,my,nl,nz,sg,es,gb,us"
pref("browser.soft_reload.only_force_validate_top_level_document", true); // prev: false
  // ^ nice: https://bugzilla.mozilla.org/show_bug.cgi?id=1468476#c56
pref("browser.startup.upgradeDialog.enabled", true); // prev: false
pref("dom.streams.pipeTo.enabled", true); // prev: false
pref("dom.streams.readable_stream_default_controller.enabled", true); // prev: false
pref("dom.streams.readable_stream_default_reader.enabled", true); // prev: false
pref("dom.streams.writable_streams.enabled", true); // prev: false
  // ^ https://developer.mozilla.org/en-US/docs/Web/API/Streams_API
pref("extensions.formautofill.creditCards.supportedCountries", "US,CA,GB,FR,DE"); // prev: "US,CA,UK,FR,DE"
pref("gfx.offscreencanvas.domain-allowlist", "*.zoom.us,zoom.us"); // prev: "*.zoom.us"
pref("gfx.webrender.dcomp-video-overlay-win", true); // prev: false
pref("gfx.webrender.dcomp-video-yuv-overlay-win", true); // prev: false
pref("javascript.options.wasm_caching", false); // prev: true
pref("layout.css.grid-item-baxis-measurement.enabled", true); // prev: false
pref("media.ffmpeg.customized-buffer-allocation", true); // prev: false
pref("media.peerconnection.mtransport_process", true); // prev: false

[rusty-snake]

edited for readability

pref("browser.contentblocking.features.strict",
   "tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,lvl2,rp,rpTop,ocsp");
// prev: "tp,tpPrivate,cookieBehavior5,cookieBehaviorPBM5,cm,fp,stp,lvl2,rp,ocsp"

New: rpTop Description: Restrict relaxing default referrer policy for top navigation

[Thorin-Oakenpants]

FYI: marked for visibility + fingerprinting

• widget.windows.overlay-scrollbars.enabled
• widget.gtk.overlay-scrollbars.enabled

note: there is also an old macOS pref which can be forced or respect OS settings. And of course android uses overlay scrollbars

not exactly the right prefs (at least on windows), and we can await RFP to enforce overlay scrollbars on all platforms - mainly to reduce the plethora of results on linux - I think the pref to use is ui.useOverlayScrollbars