ToDo: diffs FF135-FF136 #1950
Description
FF136 release date: Mar. 4th 2025
FF136 release notes
FF136 for developers
FF136 security advisories
94 diffs ( 56 new, 9 gone, 29 different )
new in v136.0:
- pref("privacy.resistFingerprinting.skipEarlyBlankFirstPaint", true); 1448423 - dc3a3d7
- FYI, done last release, see changelog v135, v136, v137, v138, v139 #1941
2813- pref("privacy.clearOnShutdown_v2.browsingHistoryAndDownloads", true);
- pref("privacy.clearOnShutdown_v2.formdata", false);
2821- pref("privacy.clearSiteData.browsingHistoryAndDownloads", false);
- pref("privacy.clearSiteData.formdata", false);
2831- pref("privacy.clearHistory.browsingHistoryAndDownloads", true);
- pref("privacy.clearHistory.formdata", false);
- FYI
- pref("datareporting.usage.uploadEnabled", true); 1921218
- Settings > Privacy & Security > Firefox Data Collection and Use > Send daily usage ping to Mozilla
- controlled by the master switch
8501datareporting.healthreport.uploadEnabled - ^ https://hg-edge.mozilla.org/integration/autoland/rev/e80d7e8658ef#l2.12
- pref("privacy.clearSiteDataHeader.cache.enabled", false); 1942272
- https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/136#experimental_web_features
- ^ this is confusing, makes it seem like they enabled it
- they will re-land it when it's more robust
- https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Clear-Site-Data
- this is an API for sites, not for the browser sanitizing
- https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/136#experimental_web_features
- pref("datareporting.usage.uploadEnabled", true); 1921218
ignore
click me for details
==NEW
pref("browser.disable_pickers_background_tabs", true);
pref("browser.disable_pickers_in_hidden_extension_pages", false);
pref("browser.http.blank_page_with_error_response.enabled", true);
pref("browser.newtabpage.activity-stream.discoverystream.sections.customizeMenuPanel.enabled", false);
pref("browser.newtabpage.activity-stream.discoverystream.sections.topicSelection.enabled", false);
pref("browser.newtabpage.activity-stream.feeds.adsfeed", true);
pref("browser.newtabpage.activity-stream.newtabLogo.aprilfools", false);
pref("browser.newtabpage.activity-stream.newtabShortcuts.refresh", false);
pref("browser.newtabpage.activity-stream.newtabWallpapers.customColor.enabled", false);
pref("browser.newtabpage.activity-stream.unifiedAds.adsFeed.enabled", false);
pref("browser.newtabpage.activity-stream.unifiedAds.adsFeed.spocs.enabled", false);
pref("browser.newtabpage.activity-stream.unifiedAds.adsFeed.tiles.enabled", false);
pref("browser.urlbar.quicksuggest.ampMatchingStrategy", 0);
pref("clipboard.copy_image.as_png", true);
pref("clipboard.copy_image_file.as_png", true);
pref("devtools.netmonitor.ui.default-raw-response", false);
pref("dom.input_events.dispatch_before_compositionend", true);
pref("dom.origin-trials.mls.state", 0);
pref("dom.quotaManager.temporaryStorage.incrementalOriginInitialization", false);
pref("dom.security.https_first_for_local_addresses", false);
pref("dom.security.https_first_for_unknown_suffixes", false);
pref("dom.svg.pathSegment.enabled", false);
pref("dom.text_fragments.create_text_fragment.enabled", false);
pref("dom.webcomponents.lift-adoptedstylesheets-restriction.enabled", false);
pref("dom.workers.timeoutmanager", false);
pref("extensions.userScripts.mv3.enabled", true);
pref("javascript.options.experimental.error_capture_stack_trace", false);
pref("layout.css.grid-flex-spanning-items-intrinsic-sizing.enabled", false);
pref("layout.css.hyphenate-limit-chars.enabled", false);
pref("layout.testing.top-level-always-active", false);
pref("media.peerconnection.video.use_dd", true);
pref("media.webrtc.simulcast.av1.enabled", true);
pref("media.webrtc.simulcast.h264.enabled", true);
pref("memory.lazypurge.enable", true);
pref("memory.lazypurge.maximum_delay", 5000);
pref("memory.lazypurge.minimum_idle_budget", 5);
pref("network.http.basic_http_auth.enabled", true);
pref("network.http.move_to_pending_list_after_network_change", true);
pref("privacy.resistFingerprinting.randomization.canvas.disable_for_chrome", false);
pref("privacy.restrict3rdpartystorage.heuristic.exclude_third_party_trackers", false);
pref("privacy.restrict3rdpartystorage.heuristic.navigation", false);
pref("privacy.sanitize.clearOnShutdown.hasMigratedToNewPrefs3", false);
pref("privacy.sanitize.cpd.hasMigratedToNewPrefs3", false);
pref("security.browser_xhtml_csp.enabled", true);
pref("services.sync.prefs.sync.privacy.clearOnShutdown_v2.browsingHistoryAndDownloads", true);
pref("services.sync.prefs.sync.privacy.clearOnShutdown_v2.formdata", true);
pref("svg.discard.enabled", false);==REMOVED, RENAMED or HIDDEN
pref("browser.aboutwelcome.showModal", false);
pref("image.exif-density-correction.enabled", true);
pref("layout.css.computed-style.dont-resolve-image-local-refs", true);
pref("network.http.http2.move_to_pending_list_after_network_change", true);
pref("network.psl.onUpdate_notify", false);
pref("network.url.strict_data_url_base64_placement", true);
pref("security.mls.enabled", false);
pref("security.xfocsp.hideOpenInNewWindow", true);
pref("signon.rememberSignons.visibilityToggle", true);==CHANGED
pref("accessibility.ARIAElementReflection.enabled", true); // prev: false
pref("apz.mousemove_hittest_optimization.enabled", true); // prev: false
pref("apz.popups_without_remote.enabled", true); // prev: false
pref("browser.ml.chat.enabled", true); // prev: false
pref("browser.newtabpage.activity-stream.discoverystream.sections.cards.enabled", true); // prev: false
pref("browser.newtabpage.activity-stream.newNewtabExperience.colors", "#004CA4,#009E97,#7550C2,#B63B39,#C96A00,#CA9600,#CC527F"); // prev: "#0090ED,#FF4F5F,#2AC3A2,#FF7139,#A172FF,#FFA437,#FF2A8A"
pref("browser.newtabpage.activity-stream.newtabLayouts.variant-b", true); // prev: false
pref("browser.newtabpage.activity-stream.support.url", "https://support.mozilla.org/1/firefox/136.0/WINNT/en-US/new-tab"); // prev: "https://support.mozilla.org/1/firefox/135.0/WINNT/en-US/new-tab"
pref("browser.tabs.groups.dragOverDelayMS", 120); // prev: 30
pref("browser.urlbar.deduplication.thresholdDays", 0); // prev: 7
pref("captchadetection.actor.enabled", true); // prev: false
pref("devtools.debugger.features.codemirror-next", true); // prev: false
pref("devtools.debugger.features.windowless-service-workers", true); // prev: false
pref("dom.cookieStore.enabled", true); // prev: false
pref("dom.element.contenteditable.plaintext-only.enabled", true); // prev: false
pref("dom.forms.autocorrect", true); // prev: false
pref("dom.security.https_first", true); // prev: false
pref("dom.security.https_first_for_custom_ports", false); // prev: true
pref("dom.security.https_only_fire_http_request_background_timer_ms", 1500); // prev: 3000
pref("dom.security.unexpected_system_load_telemetry_enabled", false); // prev: true
pref("extensions.webcompat.smartblockEmbeds.enabled", true); // prev: false
pref("layout.css.has-slotted-selector.enabled", true); // prev: false
pref("media.webrtc.codec.video.av1.enabled", true); // prev: false
pref("network.dns.https_rr.check_record_with_cname", true); // prev: false
pref("network.http.referer.sendFromRefresh", true); // prev: false
pref("network.url.max-length", 536870912); // prev: 33554432
pref("permissions.manager.remote.enabled", true); // prev: false
pref("security.insecure_connection_text.enabled", true); // prev: false
pref("security.insecure_connection_text.pbmode.enabled", true); // prev: false