Merging upstream version 125.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

18 files changed, 604 insertions, 168 deletions

diff --git a/modules/libjar/nsJARChannel.cpp b/modules/libjar/nsJARChannel.cpp
index de86ac2133..8557327f20 100644
--- a/modules/libjar/nsJARChannel.cpp
+++ b/modules/libjar/nsJARChannel.cpp
@@ -890,7 +890,8 @@ static void RecordZeroLengthEvent(bool aIsSync, const nsCString& aSpec,
   } else if (StringEndsWith(fileName, ".properties"_ns)) {
     eventType = Telemetry::EventID::Zero_byte_load_Load_Properties;
   } else if (StringEndsWith(fileName, ".js"_ns) ||
-             StringEndsWith(fileName, ".jsm"_ns)) {
+             StringEndsWith(fileName, ".jsm"_ns) ||
+             StringEndsWith(fileName, ".mjs"_ns)) {
     // We're going to skip reporting telemetry on JS loads
     // coming not from omni.ja.
     // See Bug 1693711 for investigation into those empty loads.
diff --git a/modules/libjar/nsZipArchive.cpp b/modules/libjar/nsZipArchive.cpp
index e0ca373e49..2d845f25f0 100644
--- a/modules/libjar/nsZipArchive.cpp
+++ b/modules/libjar/nsZipArchive.cpp
@@ -17,6 +17,7 @@
 #include "mozilla/MemUtils.h"
 #include "mozilla/UniquePtrExtensions.h"
 #include "mozilla/StaticMutex.h"
+#include "mozilla/StaticPrefs_network.h"
 #include "stdlib.h"
 #include "nsDirectoryService.h"
 #include "nsWildCard.h"
@@ -242,6 +243,15 @@ nsresult nsZipHandle::Init(nsZipArchive* zip, const char* entry,
   if (!handle) return NS_ERROR_OUT_OF_MEMORY;
 
   LOG(("ZipHandle::Init entry %s", entry));
+
+  nsZipItem* item = zip->GetItem(entry);
+  if (item && item->Compression() == DEFLATED &&
+      StaticPrefs::network_jar_max_entry_size()) {
+    if (item->RealSize() > StaticPrefs::network_jar_max_entry_size()) {
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+  }
+
   handle->mBuf = MakeUnique<nsZipItemPtr<uint8_t>>(zip, entry);
   if (!handle->mBuf) return NS_ERROR_OUT_OF_MEMORY;
 
diff --git a/modules/libjar/test/mochitest/test_bug1173171.html b/modules/libjar/test/mochitest/test_bug1173171.html
index 6f18513f86..d00825e6f6 100644
--- a/modules/libjar/test/mochitest/test_bug1173171.html
+++ b/modules/libjar/test/mochitest/test_bug1173171.html
@@ -21,7 +21,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=1173171
 // A simple async XMLHttpRequest call.
 // Returns a promise with the response.
 let xhr = function(method, url, responseType) {
-  return new Promise(function(resolve, reject) {
+  return new Promise(function(resolve) {
     let xhrInstance = new XMLHttpRequest();
     xhrInstance.open(method, url, true);
     xhrInstance.onload = function() {
diff --git a/modules/libjar/test/unit/test_empty_jar_telemetry.js b/modules/libjar/test/unit/test_empty_jar_telemetry.js
index 895e88ff65..45bf83a113 100644
--- a/modules/libjar/test/unit/test_empty_jar_telemetry.js
+++ b/modules/libjar/test/unit/test_empty_jar_telemetry.js
@@ -67,7 +67,7 @@ Listener.prototype = {
       do_throw(ex);
     }
   },
-  onStartRequest(request) {
+  onStartRequest() {
     this.gotStartRequest = true;
   },
   onStopRequest(request, status) {
@@ -98,7 +98,7 @@ add_task(async function test_empty_jar_file_async() {
 
   await new Promise(resolve => {
     chan.asyncOpen(
-      new Listener(function (l) {
+      new Listener(function () {
         Assert.ok(chan.contentLength == 0);
         resolve();
       })
diff --git a/modules/libjar/test/unit/test_jarchannel.js b/modules/libjar/test/unit/test_jarchannel.js
index 9d3a571b63..239ea15d7e 100644
--- a/modules/libjar/test/unit/test_jarchannel.js
+++ b/modules/libjar/test/unit/test_jarchannel.js
@@ -45,7 +45,7 @@ Listener.prototype = {
       do_throw(ex);
     }
   },
-  onStartRequest(request) {
+  onStartRequest() {
     this.gotStartRequest = true;
   },
   onStopRequest(request, status) {
@@ -130,7 +130,7 @@ add_test(function testSyncNested() {
 /**
  * Basic reading test for asynchronously opened, nested jar channels
  */
-add_test(function testAsyncNested(next) {
+add_test(function testAsyncNested() {
   var uri = "jar:" + jarBase + "/inner40.zip!/foo";
   var chan = NetUtil.newChannel({ uri, loadUsingSystemPrincipal: true });
   chan.asyncOpen(
@@ -184,7 +184,7 @@ add_test(function testAsyncCloseUnlocks() {
   var chan = NetUtil.newChannel({ uri, loadUsingSystemPrincipal: true });
 
   chan.asyncOpen(
-    new Listener(function (l) {
+    new Listener(function () {
       Assert.ok(chan.contentLength > 0);
 
       // Drop any jar caches
diff --git a/modules/libjar/zipwriter/test/unit/test_asyncadd.js b/modules/libjar/zipwriter/test/unit/test_asyncadd.js
index 0259a7953c..9e5004b4b8 100644
--- a/modules/libjar/zipwriter/test/unit/test_asyncadd.js
+++ b/modules/libjar/zipwriter/test/unit/test_asyncadd.js
@@ -24,7 +24,7 @@ var TESTS = [
 var size = 0;
 
 var observer = {
-  onStartRequest(request) {},
+  onStartRequest() {},
 
   onStopRequest(request, status) {
     Assert.equal(status, Cr.NS_OK);
diff --git a/modules/libjar/zipwriter/test/unit/test_asyncbadadd.js b/modules/libjar/zipwriter/test/unit/test_asyncbadadd.js
index 7d1c4ec610..8bdd592232 100644
--- a/modules/libjar/zipwriter/test/unit/test_asyncbadadd.js
+++ b/modules/libjar/zipwriter/test/unit/test_asyncbadadd.js
@@ -6,7 +6,7 @@
 const FILENAME = "missing.txt";
 
 var observer = {
-  onStartRequest(request) {},
+  onStartRequest() {},
 
   onStopRequest(request, status) {
     Assert.equal(status, Cr.NS_ERROR_FILE_NOT_FOUND);
diff --git a/modules/libjar/zipwriter/test/unit/test_asyncbadremove.js b/modules/libjar/zipwriter/test/unit/test_asyncbadremove.js
index 623bc46c59..2d5e9efd96 100644
--- a/modules/libjar/zipwriter/test/unit/test_asyncbadremove.js
+++ b/modules/libjar/zipwriter/test/unit/test_asyncbadremove.js
@@ -6,7 +6,7 @@
 const FILENAME = "missing.txt";
 
 var observer = {
-  onStartRequest(request) {},
+  onStartRequest() {},
 
   onStopRequest(request, status) {
     Assert.equal(status, Cr.NS_ERROR_FILE_NOT_FOUND);
diff --git a/modules/libjar/zipwriter/test/unit/test_asyncremove.js b/modules/libjar/zipwriter/test/unit/test_asyncremove.js
index 7342e18e4f..24cf633df9 100644
--- a/modules/libjar/zipwriter/test/unit/test_asyncremove.js
+++ b/modules/libjar/zipwriter/test/unit/test_asyncremove.js
@@ -6,7 +6,7 @@
 var TESTS = ["test.txt", "test.png"];
 
 var observer = {
-  onStartRequest(request) {},
+  onStartRequest() {},
 
   onStopRequest(request, status) {
     Assert.equal(status, Cr.NS_OK);
diff --git a/modules/libjar/zipwriter/test/unit/test_bug399727.js b/modules/libjar/zipwriter/test/unit/test_bug399727.js
index 2967f69737..05176b20d6 100644
--- a/modules/libjar/zipwriter/test/unit/test_bug399727.js
+++ b/modules/libjar/zipwriter/test/unit/test_bug399727.js
@@ -23,7 +23,7 @@ BinaryComparer.prototype = {
   length: null,
   callback: null,
 
-  onStartRequest(aRequest) {},
+  onStartRequest() {},
 
   onStopRequest(aRequest, aStatusCode) {
     this.fileStream.close();
diff --git a/modules/libjar/zipwriter/test/unit/test_bug717061.js b/modules/libjar/zipwriter/test/unit/test_bug717061.js
index cb3faa3aa7..dcc30649be 100644
--- a/modules/libjar/zipwriter/test/unit/test_bug717061.js
+++ b/modules/libjar/zipwriter/test/unit/test_bug717061.js
@@ -22,7 +22,7 @@ BinaryComparer.prototype = {
   length: null,
   callback: null,
 
-  onStartRequest(aRequest) {},
+  onStartRequest() {},
 
   onStopRequest(aRequest, aStatusCode) {
     this.fileStream.close();
diff --git a/modules/libpref/init/StaticPrefList.yaml b/modules/libpref/init/StaticPrefList.yaml
index 82a2582c8a..835450712a 100644
--- a/modules/libpref/init/StaticPrefList.yaml
+++ b/modules/libpref/init/StaticPrefList.yaml
@@ -220,9 +220,9 @@
   value: false
   mirror: always
 
-- name: accessibility.ARIAReflection.enabled
+- name: accessibility.ARIAElementReflection.enabled
   type: bool
-  value: true
+  value: @IS_NIGHTLY_BUILD@
   mirror: always
 
 # Whether form controls and images should be focusable with mouse, in content
@@ -242,6 +242,12 @@
 #endif
   mirror: always
 
+# Whether to enable support for the UI Automation API on Windows.
+- name: accessibility.uia.enable
+  type: bool
+  value: false
+  mirror: always
+
 # Whether to avoid accessibility activation on Windows shortly after clipboard
 # copy.
 #
@@ -254,6 +260,18 @@
   value: 2
   mirror: always
 
+# Whether to avoid accessibility activation on Windows shortly after max button
+# hit-test for the "snap layout" feature.
+#
+# Possible values are:
+#  * 0: never
+#  * 1: always
+#  * 2 (or others): when needed
+- name: accessibility.windows.suppress-for-snap-layout
+  type: uint32_t
+  value: 2
+  mirror: always
+
 #---------------------------------------------------------------------------
 # Prefs starting with "alerts."
 #---------------------------------------------------------------------------
@@ -1135,6 +1153,20 @@
 #endif
   mirror: always
 
+# DLP agent name, for display in the browser
+- name: browser.contentanalysis.agent_name
+  type: String
+  value: "A DLP agent"
+  mirror: never
+
+# (optional) The organization name that the DLP agent should have. If this is
+# non-empty and the DLP agent is not signed with this organization name,
+# Firefox will fail the connection.
+- name: browser.contentanalysis.client_signature
+  type: String
+  value: ""
+  mirror: never
+
 # Content analysis by external applications, e.g. data-loss prevention apps
 - name: browser.contentanalysis.enabled
   type: bool
@@ -1160,12 +1192,41 @@
   value: "path_user"
   mirror: never
 
+# Space-separated list of regexs that are compared to URLs of resources
+# being checked by content-analysis.  Resources that match are not checked
+# and are always permitted.
+- name: browser.contentanalysis.allow_url_regex_list
+  type: String
+  value: ""
+  mirror: never
+
+# Space-separated list of regexs that are compared to URLs of resources
+# being checked by content-analysis.  Resources that match are not checked
+# and are always denied.
+- name: browser.contentanalysis.deny_url_regex_list
+  type: String
+  value: ""
+  mirror: never
+
 # Should CA ignore the system setting and use silent notifications?
 - name: browser.contentanalysis.silent_notifications
   type: bool
   value: false
   mirror: always
 
+# Time (secs) after which content analysis operations are considered timed-out
+- name: browser.contentanalysis.agent_timeout
+  type: uint32_t
+  value: 30
+  mirror: always
+
+# Should Firefox show a notification or dialog when content analysis blocks
+# access?
+- name: browser.contentanalysis.show_blocked_result
+  type: bool
+  value: true
+  mirror: always
+
 # Content blocking for Enhanced Tracking Protection
 - name: browser.contentblocking.database.enabled
   type: bool
@@ -1594,27 +1655,18 @@
   value: 15000
   mirror: always
 
-# Platform collection of data for session store
-- name: browser.sessionstore.platform_collection
+# Disable collection of data for session store using the native collector code,
+# instead use the older implementation that's not compatible with session
+# history in the parent (and thus Fission).
+- name: browser.sessionstore.disable_platform_collection
   type: bool
-#if defined(ANDROID) || defined(MOZ_THUNDERBIRD)
-  value: false
-#else
+#if defined(MOZ_THUNDERBIRD)
   value: true
+#else
+  value: false
 #endif
   mirror: once
-
-# Platform collection of session storage data for session store
-- name: browser.sessionstore.collect_session_storage
-  type: bool
-  value: @IS_NOT_ANDROID@
-  mirror: once
-
-# Platform collection of zoom data for session store
-- name: browser.sessionstore.collect_zoom
-  type: bool
-  value: @IS_NOT_ANDROID@
-  mirror: once
+  do_not_use_directly: true
 
 # Causes SessionStore to ignore non-final update messages from
 # browser tabs that were not caused by a flush from the parent.
@@ -2324,11 +2376,6 @@
   value: false
   mirror: always
 
-- name: dom.domrequest.enabled
-  type: RelaxedAtomicBool
-  value: false
-  mirror: always
-
 # Only intended for fuzzing purposes, this will break mozPrintCallback, etc.
 - name: dom.window_print.fuzzing.block_while_printing
   type: bool
@@ -2344,7 +2391,7 @@
 # see https://html.spec.whatwg.org/#the-popover-attribute
 - name: dom.element.popover.enabled
   type: RelaxedAtomicBool
-  value: @IS_NIGHTLY_BUILD@
+  value: true
   mirror: always
   rust: true
 
@@ -2539,7 +2586,7 @@
 # Control whether `navigator.clipboard.readText()` is exposed to content.
 - name: dom.events.asyncClipboard.readText
   type: bool
-  value: @IS_EARLY_BETA_OR_EARLIER@
+  value: true
   mirror: always
   do_not_use_directly: true
 
@@ -2628,6 +2675,13 @@
   value: false
   mirror: always
 
+# Whether the spin buttons will always appear, or if they
+# will only appear when the input is focused or hovered.
+- name: dom.forms.number.hide_spin_buttons_when_no_hover_or_focus
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
 # Whether the Gamepad API is enabled
 - name: dom.gamepad.enabled
   type: bool
@@ -2722,6 +2776,13 @@
   value: true
   mirror: always
 
+# A pref that is used to slow down connection idle maintenance for testing
+# purposes.
+- name: dom.indexedDB.connectionIdleMaintenance.pauseOnConnectionThreadMs
+  type: RelaxedAtomicUint32
+  value: 0
+  mirror: always
+
 # Whether or not indexedDB test mode is enabled.
 - name: dom.indexedDB.testing
   type: RelaxedAtomicBool
@@ -3033,11 +3094,6 @@
   value: @IS_NIGHTLY_BUILD@
   mirror: always
 
-- name: dom.media.webcodecs.force-osx-h264-enabled
-  type: RelaxedAtomicBool
-  value: false
-  mirror: always
-
 # Number of seconds of very quiet or silent audio before considering the audio
 # inaudible.
 - name: dom.media.silence_duration_for_audibility
@@ -3104,6 +3160,13 @@
   value: 10
   mirror: always
 
+# Whether to allow <object> and <embed> element loads to be retargeted to an
+# external application or download.
+- name: dom.navigation.object_embed.allow_retargeting
+  type: bool
+  value: false
+  mirror: always
+
 # Network Information API
 # This feature is not available on Firefox desktop. It exposes too much
 # user information. Let's be consistent and disable it on Android.
@@ -3618,6 +3681,13 @@
   value: false
   mirror: always
 
+# If and only if true, support for Trusted Types
+# (https://w3c.github.io/trusted-types/dist/spec/) is enabled.
+- name: dom.security.trusted_types.enabled
+  type: RelaxedAtomicBool
+  value: False
+  mirror: always
+
 # If true, all content requests will get upgraded to HTTPS://
 # (some Firefox functionality requests, like OCSP will not be affected)
 - name: dom.security.https_only_mode
@@ -4777,6 +4847,12 @@
   value: true
   mirror: always
 
+# Whether allowing using <tab> to move focus to root elements
+- name: dom.disable_tab_focus_to_root_element
+  type: bool
+  value: @IS_NIGHTLY_BUILD@
+  mirror: always
+
 #---------------------------------------------------------------------------
 # Prefs starting with "editor"
 #---------------------------------------------------------------------------
@@ -5561,7 +5637,7 @@
   value: 0
   mirror: once
 
-#if defined(XP_MACOSX)
+#if defined(XP_DARWIN)
 - name: gfx.cairo_quartz_cg_layer.enabled
   type: bool
   value: true
@@ -5698,6 +5774,12 @@
   value: false
   mirror: once
 
+# Whether OffscreenCanvas can use remote canvas
+- name: gfx.canvas.remote.allow-offscreen
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
 # How many worker threads spawned for remote canvas
 #  -1 - Calculate based on processor cores
 #   0 - No worker threads spawned, will do work on CanvasRenderThread
@@ -5820,7 +5902,7 @@
   value: false
   mirror: always
 
-#ifdef XP_MACOSX
+#ifdef XP_DARWIN
   # Create specialized video-only layers for video content in
   # fullscreen windows. Consistently works well on Apple Silicon,
   # some issues remain on Intel hardware.
@@ -5834,7 +5916,7 @@
     mirror: always
 #endif
 
-#if defined(XP_MACOSX) && defined(NIGHTLY_BUILD)
+#if defined(XP_DARWIN) && defined(NIGHTLY_BUILD)
   # Spoof the timing of the video sample instead of marking the untimed
   # sample to be displayed immediately.
 -   name: gfx.core-animation.specialize-video.spoof-timing
@@ -5856,7 +5938,7 @@
     mirror: always
 #endif
 
-#ifdef XP_MACOSX
+#ifdef XP_DARWIN
 -   name: gfx.core-animation.low-power-telemetry-frames
     type: int32_t
     value: 600
@@ -6056,13 +6138,13 @@
   mirror: once
 
 - name: gfx.font_loader.delay
-  type: uint32_t
+  type: RelaxedAtomicUint32
 #if defined(XP_WIN)
   value: 60000
 #else
   value: 8000
 #endif
-  mirror: once
+  mirror: always
 
 # Disable antialiasing of Ahem, for use in tests.
 - name: gfx.font_rendering.ahem_antialias_none
@@ -6070,7 +6152,7 @@
   value: false
   mirror: always
 
-#if defined(XP_MACOSX)
+#if defined(XP_DARWIN)
   # Set to true to revert from HarfBuzz AAT shaping to the old Core Text
   # backend.
 -   name: gfx.font_rendering.coretext.enabled
@@ -6205,6 +6287,11 @@
   value: true
   mirror: always
 
+- name: gfx.offscreencanvas.snapshot-timeout-ms
+  type: int32_t
+  value: 10000
+  mirror: always
+
 - name: gfx.omta.background-color
   type: bool
   value: true
@@ -6617,7 +6704,7 @@
     mirror: always
 #endif
 
-#ifdef XP_MACOSX
+#ifdef XP_DARWIN
   # Files show up in $HOME/Desktop/nativelayerdumps-PID/frame-123.html
 -   name: gfx.webrender.debug.dump-native-layer-tree-to-file
     type: RelaxedAtomicBool
@@ -6724,7 +6811,7 @@
 # for devices with weak GPUs, or when running SWGL.
 - name: gfx.webrender.low-quality-pinch-zoom
   type: bool
-#if defined(MOZ_WIDGET_ANDROID) && defined(NIGHTLY_BUILD)
+#if defined(MOZ_WIDGET_ANDROID)
   value: true
 #else
   value: false
@@ -6741,10 +6828,14 @@
 #endif
   mirror: once
 
-# Enable NVIDIA RTX Video Super Resolution for video overlay on Windows
-# Note: This is also a setting in NVIDIA's driver settings, so once this is
-# stable, it should default to true
-- name: gfx.webrender.super-resolution.nvidia
+# Enable VideoProcessor Super Resolution for video overlay
+- name: gfx.webrender.overlay-vp-super-resolution
+  type: bool
+  value: false
+  mirror: once
+
+# Enable VideoProcessor-HDR on SDR content for video overlay
+- name: gfx.webrender.overlay-vp-auto-hdr
   type: bool
   value: false
   mirror: once
@@ -7643,57 +7734,47 @@
   value: true
   mirror: always
 
-#if defined(ENABLE_WASM_RELAXED_SIMD)
 -   name: javascript.options.wasm_relaxed_simd
     type: bool
+#if defined(ENABLE_WASM_RELAXED_SIMD)
     value: @IS_NIGHTLY_BUILD@
+#else
+    value: false
+#endif
     mirror: always
-#endif  // defined(ENABLE_WASM_RELAXED_SIMD)
+    set_spidermonkey_pref: startup
 
-#if defined(ENABLE_WASM_MOZ_INTGEMM)
 -   name: javascript.options.wasm_moz_intgemm
     type: bool
+#if defined(ENABLE_WASM_MOZ_INTGEMM)
     value: @IS_NIGHTLY_BUILD@
+#else
+    value: false
+#endif
     mirror: always
-#endif  // defined(ENABLE_WASM_MOZ_INTGEMM)
-
-#if defined(ENABLE_WASM_EXTENDED_CONST)
--   name: javascript.options.wasm_extended_const
-    type: bool
-    value: true
-    mirror: always
-#endif  // defined(ENABLE_WASM_EXTENDED_CONST)
-
--   name: javascript.options.wasm_exceptions
-    type: bool
-    value: true
-    mirror: always
+    set_spidermonkey_pref: startup
 
 -   name: javascript.options.wasm_exnref
     type: bool
     value: @IS_EARLY_BETA_OR_EARLIER@
     mirror: always
+    set_spidermonkey_pref: startup
 
-#if defined(ENABLE_WASM_FUNCTION_REFERENCES)
--   name: javascript.options.wasm_function_references
-    type: bool
-    value: true
-    mirror: always
-#endif // defined(ENABLE_WASM_FUNCTION_REFERENCES)
-
-#if defined(ENABLE_WASM_GC)
 -   name: javascript.options.wasm_gc
     type: bool
+#if defined(ENABLE_WASM_GC)
     value: true
+#else
+    value: false
+#endif
     mirror: always
-#endif // defined(ENABLE_WASM_GC)
+    set_spidermonkey_pref: startup
 
-#if defined(ENABLE_WASM_MEMORY_CONTROL)
 -   name: javascript.options.wasm_memory_control
     type: bool
     value: false
     mirror: always
-#endif // defined(ENABLE_WASM_MEMORY_CONTROL)
+    set_spidermonkey_pref: startup
 
 #if defined(ENABLE_WASM_SIMD)
 #if defined(JS_CODEGEN_X64) || defined(JS_CODEGEN_X86)
@@ -7706,19 +7787,47 @@
 #endif
 #endif
 
-#if defined(ENABLE_WASM_MEMORY64)
 -   name: javascript.options.wasm_memory64
     type: bool
+#if defined(ENABLE_WASM_MEMORY64)
     value: @IS_NIGHTLY_BUILD@
+#else
+    value: false
+#endif
     mirror: always
-#endif  // defined(ENABLE_WASM_MEMORY64)
+    set_spidermonkey_pref: startup
+
+-   name: javascript.options.wasm_multi_memory
+    type: bool
+#if defined(ENABLE_WASM_MULTI_MEMORY)
+    value: true
+#else
+    value: false
+#endif
+    mirror: always
+    set_spidermonkey_pref: startup
+
+-   name: javascript.options.wasm_js_string_builtins
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
 
-#if defined(ENABLE_WASM_TAIL_CALLS)
 -   name: javascript.options.wasm_tail_calls
     type: bool
+#if defined(ENABLE_WASM_TAIL_CALLS)
     value: true
+#else
+    value: false
+#endif
     mirror: always
-#endif  // defined(ENABLE_WASM_TAIL_CALLS)
+    set_spidermonkey_pref: startup
+
+-   name: javascript.options.wasm_test_serialization
+    type: bool
+    value: false
+    mirror: always
+    set_spidermonkey_pref: startup
 
 # Support for pretenuring allocations based on their allocation site.
 - name: javascript.options.site_based_pretenuring
@@ -8202,6 +8311,13 @@
   mirror: always
   rust: true
 
+# Whether to respect align-content on blocks.
+- name: layout.css.align-content.blocks.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
 # Whether Container Queries are enabled
 - name: layout.css.container-queries.enabled
   type: RelaxedAtomicBool
@@ -8212,6 +8328,13 @@
 # Whether content-box and stroke-box are enabled for transform-box.
 - name: layout.css.transform-box-content-stroke.enabled
   type: RelaxedAtomicBool
+  value: true
+  mirror: always
+  rust: true
+
+# Whether transition-behavior property is enabled?
+- name: layout.css.transition-behavior.enabled
+  type: RelaxedAtomicBool
   value: @IS_NIGHTLY_BUILD@
   mirror: always
   rust: true
@@ -8371,7 +8494,7 @@
 # Whether the `content-visibility` CSS property is enabled
 - name: layout.css.content-visibility.enabled
   type: RelaxedAtomicBool
-  value: @IS_NIGHTLY_BUILD@
+  value: true
   mirror: always
   rust: true
 
@@ -8561,20 +8684,6 @@
   mirror: always
   rust: true
 
-# Is support for math-style enabled?
-- name: layout.css.math-style.enabled
-  type: RelaxedAtomicBool
-  value: true
-  mirror: always
-  rust: true
-
-# Is support for math-depth enabled?
-- name: layout.css.math-depth.enabled
-  type: RelaxedAtomicBool
-  value: true
-  mirror: always
-  rust: true
-
 # Is -moz-osx-font-smoothing enabled? (Only supported in OSX builds)
 - name: layout.css.osx-font-smoothing.enabled
   type: bool
@@ -8769,9 +8878,9 @@
 # numbers override as specified.
 # Note that 1 still creates a thread-pool of one thread!
 - name: layout.css.stylo-threads
-  type: int32_t
+  type: RelaxedAtomicInt32
   value: -1
-  mirror: once
+  mirror: always
   rust: true
 
 # Stylo work unit size. This is the amount of nodes we'll process in a single
@@ -8876,6 +8985,12 @@
   mirror: always
   rust: true
 
+# UA styles for h1 in article/aside/nav/section. See bug 1883896.
+- name: layout.css.h1-in-section-ua-styles.enabled
+  type: RelaxedAtomicBool
+  value: @IS_NOT_NIGHTLY_BUILD@
+  mirror: always
+
 # The maximum width or height of the cursor we should allow when intersecting
 # the UI, in CSS pixels.
 - name: layout.cursor.block.max-size
@@ -9196,12 +9311,6 @@
   value: true
   mirror: always
 
-# Handle scroll-anchoring adjustments as absolute scroll position updates.
-- name: layout.css.scroll-anchoring.absolute-update
-  type: bool
-  value: true
-  mirror: always
-
 # Are shared memory User Agent style sheets enabled?
 - name: layout.css.shared-memory-ua-sheets.enabled
   type: bool
@@ -9646,7 +9755,7 @@
 # Is support for MediaKeys.getStatusForPolicy enabled?
 - name: media.eme.hdcp-policy-check.enabled
   type: bool
-  value: false
+  value: @IS_NIGHTLY_OR_DEV_EDITION@
   mirror: always
 
 - name: media.eme.max-throughput-ms
@@ -9785,7 +9894,7 @@
   mirror: always
 #endif
 
-#ifdef MOZ_FFVPX
+
 - name: media.rdd-ffvpx.enabled
   type: RelaxedAtomicBool
 #if defined(XP_WIN)
@@ -9802,7 +9911,6 @@
   value: false
 #endif
   mirror: always
-#endif
 
 #ifdef MOZ_WMF
 - name: media.rdd-wmf.enabled
@@ -9946,12 +10054,10 @@
   mirror: always
 #endif
 
-#ifdef MOZ_FFVPX
 - name: media.utility-ffvpx.enabled
   type: RelaxedAtomicBool
   value: true
   mirror: always
-#endif
 
 #ifdef MOZ_WMF
 - name: media.utility-wmf.enabled
@@ -10048,13 +10154,11 @@
 #endif
     mirror: always
 
-#if defined(MOZ_FFMPEG) || defined(MOZ_FFVPX)
 # Allow using openh264 decoding with ffmpeg
 -   name: media.ffmpeg.allow-openh264
     type: RelaxedAtomicBool
     value: @IS_NOT_NIGHTLY_BUILD@
     mirror: always
-#endif  # MOZ_FFMPEG || MOZ_FFVPX
 
 #ifdef MOZ_WIDGET_GTK
 # Use VA-API for ffmpeg video playback on Linux
@@ -10074,15 +10178,6 @@
   mirror: once
 #endif # MOZ_WIDGET_GTK
 
--   name: media.ffvpx.enabled
-    type: RelaxedAtomicBool
-#ifdef MOZ_FFVPX
-    value: true
-#else
-    value: false
-#endif
-    mirror: always
-
 # Set to true in marionette tests to disable the sanity test
 # which would lead to unnecessary start of the RDD process.
 -   name: media.sanity-test.disabled
@@ -10173,7 +10268,11 @@
 # 2 : enable for encrypted only, 3 : enable for clear only
 -   name: media.wmf.media-engine.enabled
     type: RelaxedAtomicUint32
+#if defined(NIGHTLY_BUILD)
+    value: 2
+#else
     value: 0
+#endif
     mirror: always
 
 # Testing purpose, enable media engine on channel decoder as well.
@@ -10200,6 +10299,12 @@
     value: 2
     mirror: always
 
+# Bypass the gfx block list check for the media engine playback.
+-   name: media.wmf.media-engine.bypass-gfx-blocklist
+    type: RelaxedAtomicBool
+    value: false
+    mirror: always
+
 # [TEST-ONLY] Use Media Foundation Clearkey CDM for EME related testing.
 -   name: media.eme.wmf.clearkey.enabled
     type: RelaxedAtomicBool
@@ -10217,8 +10322,8 @@
 # Enable PlayReady DRM for EME
 -   name: media.eme.playready.enabled
     type: RelaxedAtomicBool
-#if defined(MOZ_WMF_CDM) && defined(NIGHTLY_BUILD)
-    value: false # TODO: enable this when ready to play.
+#if defined(MOZ_WMF_CDM) && defined(IS_NIGHTLY_OR_DEV_EDITION)
+    value: true
 #else
     value: false
 #endif
@@ -10237,6 +10342,8 @@
     type: RelaxedAtomicUint32
 #if defined(NIGHTLY_BUILD)
     value: 1
+#elif defined(MOZ_DEV_EDITION)
+    value: 2
 #else
     value: 0
 #endif
@@ -11625,6 +11732,12 @@
   value: 10
   mirror: always
 
+# Max size, in bytes, for received HTTP response header.
+- name: network.http.max_response_header_size
+  type: RelaxedAtomicUint32
+  value: 393216
+  mirror: always
+
 # This preference, if true, causes all UTF-8 domain names to be normalized to
 # punycode.  The intention is to allow UTF-8 domain names as input, but never
 # generate them from punycode.
@@ -11768,10 +11881,228 @@
 # Indicates whether the `fetchpriority` attribute for elements which support it
 # (e.g. `<script>`) is enabled.
 - name: network.fetchpriority.enabled
-  type: bool
+  type: RelaxedAtomicBool
   value: false
   mirror: always
 
+# Adjustments to apply to the internal priority of <link rel=preload as=script
+# fetchpriority=low/high/auto> and equivalent Link header with respect to the
+# case when network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to HIGHEST.
+# - When the flag is enabled, it respectively maps to LOW/HIGHEST/HIGHEST.
+- name: network.fetchpriority.adjustments.link-preload-script.low
+  type: int32_t
+  value: 30
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-script.high
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-script.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <script type="module"
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.module-script.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.module-script.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.module-script.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of async or defer <script
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.async-or-defer-script.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.async-or-defer-script.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.async-or-defer-script.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <script
+# fetchpriority=low/high/auto> inside the <head>, with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.script-in-head.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.script-in-head.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.script-in-head.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <script
+# fetchpriority=low/high/auto> (other than the scripts handled above) with
+# respect to the case when network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.other-script.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.other-script.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.other-script.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=font
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to HIGH.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/HIGH.
+- name: network.fetchpriority.adjustments.link-preload-font.low
+  type: int32_t
+  value: 20
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-font.high
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-font.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=fetch
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.link-preload-fetch.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-fetch.high
+  type: int32_t
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-fetch.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of deferred style for
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/NORMAL/NORMAL.
+- name: network.fetchpriority.adjustments.deferred-style.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.deferred-style.high
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.deferred-style.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=style
+# fetchpriority=low/high/auto> with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to HIGHEST.
+# - When the flag is enabled, it respectively maps to HIGH/HIGHEST/HIGHEST.
+- name: network.fetchpriority.adjustments.link-preload-style.low
+  type: int32_t
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-style.high
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.link-preload-style.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of other non-deferred
+# stylesheet load for fetchpriority=low/high/auto with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to HIGH/HIGHEST/NORMAL.
+- name: network.fetchpriority.adjustments.non-deferred-style.low
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.non-deferred-style.high
+  type: int32_t
+  value: -20
+  mirror: always
+- name: network.fetchpriority.adjustments.non-deferred-style.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of gloable fetch API
+# for fetchpriority=low/high/auto with respect to the case when
+# network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to NORMAL.
+# - When the flag is enabled, it respectively maps to LOW/HIGH/NORMAL.
+- name: network.fetchpriority.adjustments.global-fetch-api.low
+  type: RelaxedAtomicInt32
+  value: 10
+  mirror: always
+- name: network.fetchpriority.adjustments.global-fetch-api.high
+  type: RelaxedAtomicInt32
+  value: -10
+  mirror: always
+- name: network.fetchpriority.adjustments.global-fetch-api.auto
+  type: RelaxedAtomicInt32
+  value: 0
+  mirror: always
+
+# Adjustments to apply to the internal priority of <link rel=preload as=images
+# fetchpriority=low/high/auto> and <img fetchpriority=low/high/auto> with
+# respect to the case when network.fetchpriority is disabled.
+# - When the flag is disabled, Gecko currently sets priority to LOW.
+# - When the flag is enabled, it respectively maps to LOW/LOW/HIGH.
+# The image code can currently further adjust the priority for image load, see
+# imgRequest::BoostPriority and AdjustPriorityForImages.
+- name: network.fetchpriority.adjustments.images.low
+  type: int32_t
+  value: 0
+  mirror: always
+- name: network.fetchpriority.adjustments.images.high
+  type: int32_t
+  value: -20
+  mirror: always
+- name: network.fetchpriority.adjustments.images.auto
+  type: int32_t
+  value: 0
+  mirror: always
+
 # Enables `<link rel="preconnect">` tag and `Link: rel=preconnect` response header
 # handling.
 - name: network.preconnect
@@ -11845,12 +12176,18 @@
   value: true
   mirror: always
 
-# Whether we can send OnDataAvailable to content process directly.
+# Whether we can send OnDataFinished to content process directly.
 - name: network.send_OnDataFinished.nsInputStreamPump
   type: RelaxedAtomicBool
   value: true
   mirror: always
 
+# Whether we can send OnDataFinished to cssLoader in content process.
+- name: network.send_OnDataFinished.cssLoader
+  type: RelaxedAtomicBool
+  value: @IS_EARLY_BETA_OR_EARLIER@
+  mirror: always
+
 # Whether we can send send OnDataFinished only after dispatching
 # all the progress events on the main thread
 - name: network.send_OnDataFinished_after_progress_updates
@@ -11900,7 +12237,11 @@
 # Use platform DNS APIs (where available) to resolve HTTPS queries
 - name: network.dns.native_https_query
   type: RelaxedAtomicBool
+#if defined(EARLY_BETA_OR_EARLIER) && !defined(XP_MACOSX)
+  value: true
+#else
   value: false
+#endif
   mirror: always
 
 # DnsQuery_A is broken for HTTPS queries on Windows 10.
@@ -11957,6 +12298,18 @@
   value: 5
   mirror: always
 
+# Whether to use WPAD while configuring proxy with system settings
+- name: network.proxy.system_wpad
+  type: bool
+  value: false
+  mirror: always
+
+# Whether to allow the use of WPAD while configuring proxy with system settings
+- name: network.proxy.system_wpad.allowed
+  type: bool
+  value: false
+  mirror: always
+
 # Whether the SOCKS proxy should be in charge of DNS resolution.
 - name: network.proxy.socks_remote_dns
   type: RelaxedAtomicBool
@@ -12713,22 +13066,18 @@
   value: false
   mirror: always
 
-# CacheStorageService::MemoryPool::PurgeByFrecency does a rather expensive
-# sort we cannot interrupt by an incoming cache operation, so we want the
-# purging to do some progress to not have just wasted cycles.
-# Initial default 0, see bug 1879814.
-- name: network.cache.purgebyfrecency_minprogress_disk
+# How much progress we want to do minimum when purging under pressure.
+# On disk, we may see blocking I/O, so for now we keep 0 here.
+- name: network.cache.purge_minprogress_disk
   type: RelaxedAtomicUint32
   value: 0
   mirror: always
 
-# CacheStorageService::MemoryPool::PurgeByFrecency does a rather expensive
-# sort we cannot interrupt by an incoming cache operation, so we want the
-# purging to do at least some progress to not have just wasted cycles.
-# Initial default 0, see bug 1879814.
-- name: network.cache.purgebyfrecency_minprogress_memory
+# How much progress we want to do minimum when purging under pressure.
+# In memory, purging is cheap and memory is precious.
+- name: network.cache.purge_minprogress_memory
   type: RelaxedAtomicUint32
-  value: 0
+  value: 32
   mirror: always
 
 # When true we will dispatch a background task (separate process) to
@@ -12785,6 +13134,15 @@
   value: true
   mirror: always
 
+# When decompressing an archived entry we need to allocate a buffer
+# large enough to hold the uncompressed entry. This pref specifies the max
+# size of such a buffer.
+# When set to 0 there is no limit.
+- name: network.jar.max_entry_size
+  type: RelaxedAtomicUint32
+  value: 256*1024*1024 # 256 Mb
+  mirror: always
+
 # When this pref is true, we will use the HTTPS acceptable content encoding
 # list for trustworthy domains such as http://localhost
 - name: network.http.encoding.trustworthy_is_https
@@ -14285,7 +14643,11 @@
 
 - name: security.tls.enable_kyber
   type: RelaxedAtomicBool
+#ifdef ANDROID
   value: false
+#else
+  value: @IS_NIGHTLY_BUILD@
+#endif
   mirror: always
 
 - name: security.ssl.treat_unsafe_negotiation_as_broken
@@ -14507,6 +14869,12 @@
   value: @IS_NOT_EARLY_BETA_OR_EARLIER@
   mirror: always
 
+# Whether SVGAElement.text is enabled.
+- name: svg.SVGAElement.text.enabled
+  type: bool
+  value: false
+  mirror: always
+
 # Tweak which elements are allowed in <svg:use> subtrees, and in which
 # circumstances. See RemoveForbiddenNodes in SVGUseElement.cpp for the spec
 # text.
@@ -14858,6 +15226,12 @@
   value: @IS_ANDROID@
   mirror: always
 
+# Delay in milliseconds for tooltips
+- name: ui.tooltip.delay_ms
+  type: uint32_t
+  value: 500
+  mirror: always
+
 # If the user puts a finger down on an element and we think the user might be
 # executing a pan gesture, how long do we wait before tentatively deciding the
 # gesture is actually a tap and activating the target element?
@@ -14867,11 +15241,10 @@
   mirror: always
 
 # If the user has clicked an element, how long do we keep the :active state
-# before it is cleared by the mouse sequences fired after a
-# touchstart/touchend.
+# before it is cleared.
 - name: ui.touch_activation.duration_ms
   type: int32_t
-  value: 10
+  value: 50
   mirror: always
 
 # Prevent system colors from being exposed to CSS or canvas.
@@ -15577,6 +15950,23 @@
   mirror: always
 #endif
 
+# Whether native GTK global menubar support is enabled.
+# Disabled because there are some minor bugs and it needs deeper integration
+# with the front-end.
+- name: widget.gtk.global-menu.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
+# Whether GTK global menubar support is enabled using wayland's experimental
+# dbus_annotation protocol:
+# https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/52
+# Disabled until it has a final shape and it is available in compositors.
+- name: widget.gtk.global-menu.wayland.enabled
+  type: RelaxedAtomicBool
+  value: false
+  mirror: always
+
 # Whether native GTK context menus are enabled.
 # Disabled because at the very least there's missing custom icon support.
 - name: widget.gtk.native-context-menus
@@ -15615,6 +16005,12 @@
   value: false
   mirror: always
 
+# Whether to ignore middle click events on widget level.
+- name: widget.gtk.middle-click-enabled
+  type: bool
+  value: true
+  mirror: always
+
 # Whether we enable rounded bottom corners on GTK by default.
 #
 # The implementation is a bit hacky (see details in bug 1850827) so behind a
@@ -15625,6 +16021,12 @@
   mirror: always
   rust: true
 
+# Whether non-native titlebar buttons are enabled for lightweight themes.
+- name: widget.gtk.non-native-titlebar-buttons.enabled
+  type: RelaxedAtomicBool
+  value: true
+  mirror: always
+
 # Whether selection colors for the non-system theme get passed from the system
 # GTK theme.
 - name: widget.gtk.alt-theme.selection
@@ -15665,6 +16067,12 @@
   value: 2
   mirror: always
 
+# Whether to use gtk legacy cursor API.
+- name: widget.gtk.legacy-cursors.enabled
+  type: bool
+  value: false
+  mirror: always
+
 # Whether to use gtk high contrast themes to disable content styling like on
 # windows high contrast mode.
 - name: widget.content.gtk-high-contrast.enabled
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 6e68b4d1db..7157f197e8 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -335,6 +335,12 @@ pref("media.videocontrols.keyboard-tab-to-all-controls", true);
   pref("media.peerconnection.ice.proxy_only", false);
   pref("media.peerconnection.ice.proxy_only_if_pbmode", false);
   pref("media.peerconnection.turn.disable", false);
+  pref("media.peerconnection.treat_warnings_as_errors", false);
+  #ifdef NIGHTLY_BUILD
+    pref("media.peerconnection.description.legacy.enabled", false);
+  #else
+    pref("media.peerconnection.description.legacy.enabled", true);
+  #endif
 
   // 770 = DTLS 1.0, 771 = DTLS 1.2, 772 = DTLS 1.3
 pref("media.peerconnection.dtls.version.min", 771);
@@ -621,6 +627,19 @@ pref("toolkit.telemetry.dap_helper", "https://dap.services.mozilla.com");
 pref("toolkit.telemetry.dap_helper_owner", "Mozilla");
 pref("toolkit.telemetry.dap.logLevel", "Warn");
 
+// pref for mozilla to induce a new ping from users. This value should only ever be increased
+// and doing so will induce a new data ping from all users, so be careful. Mozilla may edit
+// this pref via our remote update/experimentation system
+pref("toolkit.telemetry.user_characteristics_ping.current_version", 0);
+// pref containing the value for the user of the last version of the ping we sent
+// if a user wants to disable this type of ping explicitly, set this to -1
+// firefox/mozilla will not modify this value if a negative number is present.
+pref("toolkit.telemetry.user_characteristics_ping.last_version_sent", 0);
+// A unique identifier for the user characteristics ping. This is not the same as
+// the telemetry client id (which is not sent in this ping), it is cleared when a
+// user opts-out of telemetry, it is set upon first telemetry submission
+pref("toolkit.telemetry.user_characteristics_ping.uuid", "");
+
 // AsyncShutdown delay before crashing in case of shutdown freeze
 // ASan, TSan and code coverage builds can be considerably slower. Extend the
 // grace period for both the asyncshutdown and the terminator.
@@ -717,6 +736,7 @@ pref("devtools.performance.recording.threads.remote", "[\"GeckoMain\",\"Composit
 // build artifacts of local builds.
 pref("devtools.performance.recording.objdirs", "[]");
 pref("devtools.performance.recording.power.external-url", "");
+pref("devtools.performance.recording.markers.external-url", "");
 // The popup will display some introductory text the first time it is displayed.
 pref("devtools.performance.popup.intro-displayed", false);
 
@@ -1010,6 +1030,14 @@ pref("javascript.options.mem.gc_helper_thread_ratio", 50);
 // JSGC_MAX_HELPER_THREADS
 pref("javascript.options.mem.gc_max_helper_threads", 8);
 
+// Eager nursery collection parameters:
+// JSGC_NURSERY_EAGER_COLLECTION_THRESHOLD_KB
+pref("javascript.options.mem.nursery_eager_collection_threshold_kb", 256);
+// JSGC_NURSERY_EAGER_COLLECTION_THRESHOLD_PERCENT
+pref("javascript.options.mem.nursery_eager_collection_threshold_percent", 25);
+// JSGC_NURSERY_EAGER_COLLECTION_TIMEOUT_MS
+pref("javascript.options.mem.nursery_eager_collection_timeout_ms", 5000);
+
 pref("javascript.options.shared_memory", true);
 
 pref("javascript.options.throw_on_debuggee_would_run", false);
@@ -1066,8 +1094,8 @@ pref("network.protocol-handler.external.disk", false);
 pref("network.protocol-handler.external.disks", false);
 pref("network.protocol-handler.external.afp", false);
 pref("network.protocol-handler.external.moz-icon", false);
-pref("network.protocol-handler.external.firefox", false);
-pref("network.protocol-handler.external.firefox-private", false);
+pref("network.protocol-handler.external.firefox-bridge", false);
+pref("network.protocol-handler.external.firefox-private-bridge", false);
 
 // Don't allow  external protocol handlers for common typos
 pref("network.protocol-handler.external.ttp", false);  // http
@@ -1264,9 +1292,6 @@ pref("network.http.enforce-framing.http1", false); // should be named "strict"
 pref("network.http.enforce-framing.soft", true);
 pref("network.http.enforce-framing.strict_chunked_encoding", true);
 
-// Max size, in bytes, for received HTTP response header.
-pref("network.http.max_response_header_size", 393216);
-
 // The ratio of the transaction count for the focused window and the count of
 // all available active connections.
 pref("network.http.focused_window_transaction_ratio", "0.9");
@@ -3625,6 +3650,11 @@ pref("browser.translations.simulateUnsupportedEngine", false);
 pref("browser.translations.chaos.errors", false);
 pref("browser.translations.chaos.timeoutMS", 0);
 
+// Enable the experimental machine learning inference engine.
+pref("browser.ml.enable", false);
+// Set to "All" to see all logs, which are useful for debugging.
+pref("browser.ml.logLevel", "Error");
+
 // When a user cancels this number of authentication dialogs coming from
 // a single web page in a row, all following authentication dialogs will
 // be blocked (automatically canceled) for that page. The counter resets
@@ -3936,11 +3966,7 @@ pref("security.external_protocol_requires_permission", true);
 pref("extensions.formautofill.available", "detect");
 pref("extensions.formautofill.addresses.supported", "detect");
 pref("extensions.formautofill.addresses.enabled", true);
-#if defined(NIGHTLY_BUILD)
-  pref("extensions.formautofill.addresses.capture.enabled", true);
-#else
-  pref("extensions.formautofill.addresses.capture.enabled", false);
-#endif
+pref("extensions.formautofill.addresses.capture.enabled", true);
 #if defined(ANDROID)
   // On android we have custom logic to control this. Ideally we should use nimbus there as well.
   // https://github.com/mozilla-mobile/firefox-android/blob/d566743ea0f041ce27c1204da903de380f96b46e/fenix/app/src/main/java/org/mozilla/fenix/utils/Settings.kt#L1502-L1510
@@ -3987,7 +4013,7 @@ pref("toolkit.osKeyStore.loglevel", "Warn");
 
 pref("extensions.formautofill.supportRTL", false);
 
-// Controls the log level for CookieBannerListService.jsm.
+// Controls the log level for CookieBannerListService.sys.mjs.
 pref("cookiebanners.listService.logLevel", "Error");
 
 // Controls the log level for Cookie Banner Auto Clicking.
diff --git a/modules/libpref/nsIPrefBranch.idl b/modules/libpref/nsIPrefBranch.idl
index 4d60a616b2..8f03078398 100644
--- a/modules/libpref/nsIPrefBranch.idl
+++ b/modules/libpref/nsIPrefBranch.idl
@@ -494,7 +494,6 @@ interface nsIPrefBranch : nsISupports
 
 %{C++
 
-#define NS_PREFBRANCH_CONTRACTID "@mozilla.org/preferencesbranch;1"
 /**
  * Notification sent when a preference changes.
  */
diff --git a/modules/libpref/nsIPrefLocalizedString.idl b/modules/libpref/nsIPrefLocalizedString.idl
index 236ce7acdf..a61f8ea979 100644
--- a/modules/libpref/nsIPrefLocalizedString.idl
+++ b/modules/libpref/nsIPrefLocalizedString.idl
@@ -21,14 +21,6 @@ interface nsIPrefLocalizedString : nsISupportsString {};
 
 %{C++
 
-#define NS_PREFLOCALIZEDSTRING_CID                     \
-  { /* {064d9cee-1dd2-11b2-83e3-d25ab0193c26} */       \
-    0x064d9cee,                                        \
-    0x1dd2,                                            \
-    0x11b2,                                            \
-    { 0x83, 0xe3, 0xd2, 0x5a, 0xb0, 0x19, 0x3c, 0x26 } \
-  }
-
 #define NS_PREFLOCALIZEDSTRING_CONTRACTID "@mozilla.org/pref-localizedstring;1"
 
 %}
diff --git a/modules/libpref/test/browser/browser_sanitization_events.js b/modules/libpref/test/browser/browser_sanitization_events.js
index f71bd04879..5373478523 100644
--- a/modules/libpref/test/browser/browser_sanitization_events.js
+++ b/modules/libpref/test/browser/browser_sanitization_events.js
@@ -51,7 +51,7 @@ add_task(async function sanitized_pref_test() {
 
   await BrowserTestUtils.withNewTab(
     { gBrowser, url: PAGE_URL },
-    async function (browser) {}
+    async function () {}
   );
 
   // Needed because otherwise we advance too quickly
diff --git a/modules/libpref/test/unit/test_bug345529.js b/modules/libpref/test/unit/test_bug345529.js
index 05fce35f57..21a4fa5fa7 100644
--- a/modules/libpref/test/unit/test_bug345529.js
+++ b/modules/libpref/test/unit/test_bug345529.js
@@ -9,7 +9,7 @@ function run_test() {
   var observer = {
     QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
 
-    observe: function observe(aSubject, aTopic, aState) {
+    observe: function observe() {
       Services.prefs.removeObserver(PREF_NAME, observer);
     },
   };
diff --git a/modules/libpref/test/unit/test_bug577950.js b/modules/libpref/test/unit/test_bug577950.js
index f9106a349f..0da37b3a78 100644
--- a/modules/libpref/test/unit/test_bug577950.js
+++ b/modules/libpref/test/unit/test_bug577950.js
@@ -6,7 +6,7 @@ function run_test() {
   var observer = {
     QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
 
-    observe: function observe(aSubject, aTopic, aState) {
+    observe: function observe() {
       // Don't do anything.
     },
   };