Merging upstream version 115.10.0esr.

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

20 files changed, 435 insertions, 67 deletions

diff --git a/toolkit/components/glean/bindings/private/TimingDistribution.cpp b/toolkit/components/glean/bindings/private/TimingDistribution.cpp
index 78aad6d4cd..5a1a6d3daf 100644
--- a/toolkit/components/glean/bindings/private/TimingDistribution.cpp
+++ b/toolkit/components/glean/bindings/private/TimingDistribution.cpp
@@ -25,7 +25,7 @@ extern "C" NS_EXPORT void GIFFT_TimingDistributionStart(
   auto mirrorId = mozilla::glean::HistogramIdForMetric(aMetricId);
   if (mirrorId) {
     mozilla::glean::GetTimerIdToStartsLock().apply([&](auto& lock) {
-      auto tuple = std::make_tuple(aMetricId, aTimerId);
+      auto tuple = mozilla::glean::MetricTimerTuple{aMetricId, aTimerId};
       // It should be all but impossible for anyone to have already inserted
       // this timer for this metric given the monotonicity of timer ids.
       (void)NS_WARN_IF(lock.ref()->Remove(tuple));
@@ -40,7 +40,8 @@ extern "C" NS_EXPORT void GIFFT_TimingDistributionStopAndAccumulate(
   auto mirrorId = mozilla::glean::HistogramIdForMetric(aMetricId);
   if (mirrorId) {
     mozilla::glean::GetTimerIdToStartsLock().apply([&](auto& lock) {
-      auto optStart = lock.ref()->Extract(std::make_tuple(aMetricId, aTimerId));
+      auto tuple = mozilla::glean::MetricTimerTuple{aMetricId, aTimerId};
+      auto optStart = lock.ref()->Extract(tuple);
       // The timer might not be in the map to be removed if it's already been
       // cancelled or stop_and_accumulate'd.
       if (!NS_WARN_IF(!optStart)) {
@@ -67,8 +68,8 @@ extern "C" NS_EXPORT void GIFFT_TimingDistributionCancel(
     mozilla::glean::GetTimerIdToStartsLock().apply([&](auto& lock) {
       // The timer might not be in the map to be removed if it's already been
       // cancelled or stop_and_accumulate'd.
-      (void)NS_WARN_IF(
-          !lock.ref()->Remove(std::make_tuple(aMetricId, aTimerId)));
+      auto tuple = mozilla::glean::MetricTimerTuple{aMetricId, aTimerId};
+      (void)NS_WARN_IF(!lock.ref()->Remove(tuple));
     });
   }
 }
diff --git a/toolkit/components/glean/build_scripts/glean_parser_ext/templates/gifft.jinja2 b/toolkit/components/glean/build_scripts/glean_parser_ext/templates/gifft.jinja2
index 4a58ef5411..9d0c10cdf6 100644
--- a/toolkit/components/glean/build_scripts/glean_parser_ext/templates/gifft.jinja2
+++ b/toolkit/components/glean/build_scripts/glean_parser_ext/templates/gifft.jinja2
@@ -35,7 +35,10 @@ using Telemetry::{{ probe_type }}ID;
 
 using MetricId = uint32_t; // Same type as in api/src/private/mod.rs
 using TimerId = uint64_t; // Same as in TimingDistribution.h.
-using MetricTimerTuple = std::tuple<MetricId, TimerId>;
+struct MetricTimerTuple {
+  MetricId mMetricId;
+  TimerId mTimerId;
+};
 class MetricTimerTupleHashKey : public PLDHashEntryHdr {
  public:
   using KeyType = const MetricTimerTuple&;
@@ -49,15 +52,17 @@ class MetricTimerTupleHashKey : public PLDHashEntryHdr {
 
   KeyType GetKey() const { return mValue; }
   bool KeyEquals(KeyTypePointer aKey) const {
-    return std::get<0>(*aKey) == std::get<0>(mValue) && std::get<1>(*aKey) == std::get<1>(mValue);
+    return aKey->mMetricId == mValue.mMetricId &&
+           aKey->mTimerId == mValue.mTimerId;
   }
 
   static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
   static PLDHashNumber HashKey(KeyTypePointer aKey) {
     // Chosen because this is how nsIntegralHashKey does it.
-    return HashGeneric(std::get<0>(*aKey), std::get<1>(*aKey));
+    return HashGeneric(aKey->mMetricId, aKey->mTimerId);
   }
   enum { ALLOW_MEMMOVE = true };
+  static_assert(std::is_trivially_copyable_v<MetricTimerTuple>);
 
  private:
   const MetricTimerTuple mValue;
@@ -170,6 +175,7 @@ class ScalarIDHashKey : public PLDHashEntryHdr {
     return static_cast<std::underlying_type<ScalarID>::type>(*aKey);
   }
   enum { ALLOW_MEMMOVE = true };
+  static_assert(std::is_trivially_copyable_v<ScalarID>);
 
  private:
   const ScalarID mValue;
diff --git a/toolkit/components/glean/tests/pytest/gifft_output_Histogram b/toolkit/components/glean/tests/pytest/gifft_output_Histogram
index b13df96594..f0e4c3d047 100644
--- a/toolkit/components/glean/tests/pytest/gifft_output_Histogram
+++ b/toolkit/components/glean/tests/pytest/gifft_output_Histogram
@@ -28,7 +28,10 @@ using Telemetry::HistogramID;
 
 using MetricId = uint32_t; // Same type as in api/src/private/mod.rs
 using TimerId = uint64_t; // Same as in TimingDistribution.h.
-using MetricTimerTuple = std::tuple<MetricId, TimerId>;
+struct MetricTimerTuple {
+  MetricId mMetricId;
+  TimerId mTimerId;
+};
 class MetricTimerTupleHashKey : public PLDHashEntryHdr {
  public:
   using KeyType = const MetricTimerTuple&;
@@ -42,15 +45,17 @@ class MetricTimerTupleHashKey : public PLDHashEntryHdr {
 
   KeyType GetKey() const { return mValue; }
   bool KeyEquals(KeyTypePointer aKey) const {
-    return std::get<0>(*aKey) == std::get<0>(mValue) && std::get<1>(*aKey) == std::get<1>(mValue);
+    return aKey->mMetricId == mValue.mMetricId &&
+           aKey->mTimerId == mValue.mTimerId;
   }
 
   static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
   static PLDHashNumber HashKey(KeyTypePointer aKey) {
     // Chosen because this is how nsIntegralHashKey does it.
-    return HashGeneric(std::get<0>(*aKey), std::get<1>(*aKey));
+    return HashGeneric(aKey->mMetricId, aKey->mTimerId);
   }
   enum { ALLOW_MEMMOVE = true };
+  static_assert(std::is_trivially_copyable_v<MetricTimerTuple>);
 
  private:
   const MetricTimerTuple mValue;
diff --git a/toolkit/components/glean/tests/pytest/gifft_output_Scalar b/toolkit/components/glean/tests/pytest/gifft_output_Scalar
index 66d25a2629..1ea7517407 100644
--- a/toolkit/components/glean/tests/pytest/gifft_output_Scalar
+++ b/toolkit/components/glean/tests/pytest/gifft_output_Scalar
@@ -92,6 +92,7 @@ class ScalarIDHashKey : public PLDHashEntryHdr {
     return static_cast<std::underlying_type<ScalarID>::type>(*aKey);
   }
   enum { ALLOW_MEMMOVE = true };
+  static_assert(std::is_trivially_copyable_v<ScalarID>);
 
  private:
   const ScalarID mValue;
diff --git a/toolkit/components/normandy/actions/ShowHeartbeatAction.sys.mjs b/toolkit/components/normandy/actions/ShowHeartbeatAction.sys.mjs
index d571e46167..1f6be470aa 100644
--- a/toolkit/components/normandy/actions/ShowHeartbeatAction.sys.mjs
+++ b/toolkit/components/normandy/actions/ShowHeartbeatAction.sys.mjs
@@ -76,10 +76,7 @@ export class ShowHeartbeatAction extends BaseAction {
       learnMoreUrl,
       postAnswerUrl: await this.generatePostAnswerURL(recipe),
       flowId: lazy.NormandyUtils.generateUuid(),
-      // Recipes coming from Nimbus won't have a revision_id.
-      ...(Object.hasOwn(recipe, "revision_id")
-        ? { surveyVersion: recipe.revision_id }
-        : {}),
+      surveyVersion: recipe.revision_id,
     });
 
     heartbeat.eventEmitter.once(
diff --git a/toolkit/components/normandy/lib/LegacyHeartbeat.sys.mjs b/toolkit/components/normandy/lib/LegacyHeartbeat.sys.mjs
index 501c9f70af..93c24faf5d 100644
--- a/toolkit/components/normandy/lib/LegacyHeartbeat.sys.mjs
+++ b/toolkit/components/normandy/lib/LegacyHeartbeat.sys.mjs
@@ -43,6 +43,7 @@ export const LegacyHeartbeat = {
       capabilities: ["action.show-heartbeat"],
       filter_expression: "true",
       use_only_baseline_capabilities: true,
+      revision_id: "1", // Required for the Heartbeat telemetry ping.
     };
   },
 };
diff --git a/toolkit/components/normandy/test/browser/browser_LegacyHeartbeat.js b/toolkit/components/normandy/test/browser/browser_LegacyHeartbeat.js
index 465e5c1040..a40fa7350e 100644
--- a/toolkit/components/normandy/test/browser/browser_LegacyHeartbeat.js
+++ b/toolkit/components/normandy/test/browser/browser_LegacyHeartbeat.js
@@ -9,6 +9,9 @@ const { BaseAction } = ChromeUtils.importESModule(
 const { ClientEnvironment } = ChromeUtils.importESModule(
   "resource://normandy/lib/ClientEnvironment.sys.mjs"
 );
+const { EventEmitter } = ChromeUtils.importESModule(
+  "resource://normandy/lib/EventEmitter.sys.mjs"
+);
 const { Heartbeat } = ChromeUtils.importESModule(
   "resource://normandy/lib/Heartbeat.sys.mjs"
 );
@@ -27,6 +30,9 @@ const { RecipeRunner } = ChromeUtils.importESModule(
 const { RemoteSettings } = ChromeUtils.importESModule(
   "resource://services-settings/remote-settings.sys.mjs"
 );
+const { JsonSchema } = ChromeUtils.importESModule(
+  "resource://gre/modules/JsonSchema.sys.mjs"
+);
 
 const SURVEY = {
   surveyId: "a survey",
@@ -39,9 +45,80 @@ const SURVEY = {
   repeatOption: "once",
 };
 
+// See properties.payload in
+// https://github.com/mozilla-services/mozilla-pipeline-schemas/blob/main/schemas/telemetry/heartbeat/heartbeat.4.schema.json
+
+const PAYLOAD_SCHEMA = {
+  additionalProperties: false,
+  anyOf: [
+    {
+      required: ["closedTS"],
+    },
+    {
+      required: ["windowClosedTS"],
+    },
+  ],
+  properties: {
+    closedTS: {
+      minimum: 0,
+      type: "integer",
+    },
+    engagedTS: {
+      minimum: 0,
+      type: "integer",
+    },
+    expiredTS: {
+      minimum: 0,
+      type: "integer",
+    },
+    flowId: {
+      pattern:
+        "^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}$",
+      type: "string",
+    },
+    learnMoreTS: {
+      minimum: 0,
+      type: "integer",
+    },
+    offeredTS: {
+      minimum: 0,
+      type: "integer",
+    },
+    score: {
+      minimum: 1,
+      type: "integer",
+    },
+    surveyId: {
+      type: "string",
+    },
+    surveyVersion: {
+      pattern: "^([0-9]+|[a-fA-F0-9]{64})$",
+      type: "string",
+    },
+    testing: {
+      type: "boolean",
+    },
+    version: {
+      maximum: 1,
+      minimum: 1,
+      type: "number",
+    },
+    votedTS: {
+      minimum: 0,
+      type: "integer",
+    },
+    windowClosedTS: {
+      minimum: 0,
+      type: "integer",
+    },
+  },
+  required: ["version", "flowId", "offeredTS", "surveyId", "surveyVersion"],
+  type: "object",
+};
+
 function assertSurvey(actual, expected) {
   for (const key of Object.keys(actual)) {
-    if (["postAnswerUrl", "flowId"].includes(key)) {
+    if (["flowId", "postAnswerUrl", "surveyVersion"].includes(key)) {
       continue;
     }
 
@@ -52,6 +129,7 @@ function assertSurvey(actual, expected) {
     );
   }
 
+  Assert.equal(actual.surveyVersion, "1");
   Assert.ok(actual.postAnswerUrl.startsWith(expected.postAnswerUrl));
 }
 
@@ -86,3 +164,62 @@ decorate_task(
     }
   }
 );
+
+decorate_task(
+  withClearStorage(),
+  async function testLegacyHeartbeatPingPayload() {
+    const sandbox = sinon.createSandbox();
+
+    const cleanupEnrollment = await ExperimentFakes.enrollWithFeatureConfig({
+      featureId: "legacyHeartbeat",
+      value: {
+        survey: SURVEY,
+      },
+    });
+
+    const client = RemoteSettings("normandy-recipes-capabilities");
+    sandbox.stub(client, "get").resolves([]);
+
+    // Override Heartbeat so we can get the instance and manipulate it directly.
+    let resolveHeartbeatPromise;
+    const heartbeatPromise = new Promise(resolve => {
+      resolveHeartbeatPromise = resolve;
+    });
+    class TestHeartbeat extends Heartbeat {
+      constructor(...args) {
+        super(...args);
+        resolveHeartbeatPromise(this);
+      }
+    }
+    ShowHeartbeatAction.overrideHeartbeatForTests(TestHeartbeat);
+
+    try {
+      await RecipeRunner.run();
+      const heartbeat = await heartbeatPromise;
+      // We are going to simulate the timer timing out, so we do not want it to
+      // *actually* time out.
+      heartbeat.endTimerIfPresent("surveyEndTimer");
+
+      const telemetrySentPromise = new Promise(resolve => {
+        heartbeat.eventEmitter.once("TelemetrySent", payload =>
+          resolve(payload)
+        );
+      });
+
+      // This method would be triggered when the timer timed out. This will
+      // trigger telemetry to be submitted.
+      heartbeat.close();
+
+      const payload = await telemetrySentPromise;
+
+      const result = JsonSchema.validate(payload, PAYLOAD_SCHEMA);
+      Assert.ok(result.valid);
+      Assert.equal(payload.surveyVersion, "1");
+
+      await cleanupEnrollment();
+    } finally {
+      ShowHeartbeatAction.overrideHeartbeatForTests();
+      sandbox.restore();
+    }
+  }
+);
diff --git a/toolkit/components/pdfjs/content/build/pdf.js b/toolkit/components/pdfjs/content/build/pdf.js
index f59bc41651..017a45914e 100644
--- a/toolkit/components/pdfjs/content/build/pdf.js
+++ b/toolkit/components/pdfjs/content/build/pdf.js
@@ -9375,11 +9375,13 @@ exports.FreeTextEditor = void 0;
 var _util = __w_pdfjs_require__(1);
 var _tools = __w_pdfjs_require__(5);
 var _editor = __w_pdfjs_require__(4);
+const EOL_PATTERN = /\r\n?|\n/g;
 class FreeTextEditor extends _editor.AnnotationEditor {
   #boundEditorDivBlur = this.editorDivBlur.bind(this);
   #boundEditorDivFocus = this.editorDivFocus.bind(this);
   #boundEditorDivInput = this.editorDivInput.bind(this);
   #boundEditorDivKeydown = this.editorDivKeydown.bind(this);
+  #boundEditorDivPaste = this.editorDivPaste.bind(this);
   #color;
   #content = "";
   #editorDivId = `${this.id}-editor`;
@@ -9495,6 +9497,7 @@ class FreeTextEditor extends _editor.AnnotationEditor {
     this.editorDiv.addEventListener("focus", this.#boundEditorDivFocus);
     this.editorDiv.addEventListener("blur", this.#boundEditorDivBlur);
     this.editorDiv.addEventListener("input", this.#boundEditorDivInput);
+    this.editorDiv.addEventListener("paste", this.#boundEditorDivPaste);
   }
   disableEditMode() {
     if (!this.isInEditMode()) {
@@ -9510,6 +9513,7 @@ class FreeTextEditor extends _editor.AnnotationEditor {
     this.editorDiv.removeEventListener("focus", this.#boundEditorDivFocus);
     this.editorDiv.removeEventListener("blur", this.#boundEditorDivBlur);
     this.editorDiv.removeEventListener("input", this.#boundEditorDivInput);
+    this.editorDiv.removeEventListener("paste", this.#boundEditorDivPaste);
     this.div.focus({
       preventScroll: true
     });
@@ -9539,13 +9543,10 @@ class FreeTextEditor extends _editor.AnnotationEditor {
     super.remove();
   }
   #extractText() {
-    const divs = this.editorDiv.getElementsByTagName("div");
-    if (divs.length === 0) {
-      return this.editorDiv.innerText;
-    }
     const buffer = [];
-    for (const div of divs) {
-      buffer.push(div.innerText.replace(/\r\n?|\n/, ""));
+    this.editorDiv.normalize();
+    for (const child of this.editorDiv.childNodes) {
+      buffer.push(FreeTextEditor.#getNodeContent(child));
     }
     return buffer.join("\n");
   }
@@ -9658,6 +9659,102 @@ class FreeTextEditor extends _editor.AnnotationEditor {
     }
     return this.div;
   }
+  static #getNodeContent(node) {
+    return (node.nodeType === Node.TEXT_NODE ? node.nodeValue : node.innerText).replaceAll(EOL_PATTERN, "");
+  }
+  editorDivPaste(event) {
+    const clipboardData = event.clipboardData || window.clipboardData;
+    const {
+      types
+    } = clipboardData;
+    if (types.length === 1 && types[0] === "text/plain") {
+      return;
+    }
+    event.preventDefault();
+    const paste = FreeTextEditor.#deserializeContent(clipboardData.getData("text") || "").replaceAll(EOL_PATTERN, "\n");
+    if (!paste) {
+      return;
+    }
+    const selection = window.getSelection();
+    if (!selection.rangeCount) {
+      return;
+    }
+    this.editorDiv.normalize();
+    selection.deleteFromDocument();
+    const range = selection.getRangeAt(0);
+    if (!paste.includes("\n")) {
+      range.insertNode(document.createTextNode(paste));
+      this.editorDiv.normalize();
+      selection.collapseToStart();
+      return;
+    }
+    const {
+      startContainer,
+      startOffset
+    } = range;
+    const bufferBefore = [];
+    const bufferAfter = [];
+    if (startContainer.nodeType === Node.TEXT_NODE) {
+      const parent = startContainer.parentElement;
+      bufferAfter.push(startContainer.nodeValue.slice(startOffset).replaceAll(EOL_PATTERN, ""));
+      if (parent !== this.editorDiv) {
+        let buffer = bufferBefore;
+        for (const child of this.editorDiv.childNodes) {
+          if (child === parent) {
+            buffer = bufferAfter;
+            continue;
+          }
+          buffer.push(FreeTextEditor.#getNodeContent(child));
+        }
+      }
+      bufferBefore.push(startContainer.nodeValue.slice(0, startOffset).replaceAll(EOL_PATTERN, ""));
+    } else if (startContainer === this.editorDiv) {
+      let buffer = bufferBefore;
+      let i = 0;
+      for (const child of this.editorDiv.childNodes) {
+        if (i++ === startOffset) {
+          buffer = bufferAfter;
+        }
+        buffer.push(FreeTextEditor.#getNodeContent(child));
+      }
+    }
+    this.#content = `${bufferBefore.join("\n")}${paste}${bufferAfter.join("\n")}`;
+    this.#setContent();
+    const newRange = new Range();
+    let beforeLength = bufferBefore.reduce((acc, line) => acc + line.length, 0);
+    for (const {
+      firstChild
+    } of this.editorDiv.childNodes) {
+      if (firstChild.nodeType === Node.TEXT_NODE) {
+        const length = firstChild.nodeValue.length;
+        if (beforeLength <= length) {
+          newRange.setStart(firstChild, beforeLength);
+          newRange.setEnd(firstChild, beforeLength);
+          break;
+        }
+        beforeLength -= length;
+      }
+    }
+    selection.removeAllRanges();
+    selection.addRange(newRange);
+  }
+  #setContent() {
+    this.editorDiv.replaceChildren();
+    if (!this.#content) {
+      return;
+    }
+    for (const line of this.#content.split("\n")) {
+      const div = document.createElement("div");
+      div.append(line ? document.createTextNode(line) : document.createElement("br"));
+      this.editorDiv.append(div);
+    }
+  }
+  #serializeContent() {
+    return this.#content.replaceAll("\xa0", " ");
+  }
+  static #deserializeContent(content) {
+    return content.replaceAll(" ", "\xa0");
+  }
   get contentDiv() {
     return this.editorDiv;
   }
diff --git a/toolkit/components/prompts/src/PromptUtils.sys.mjs b/toolkit/components/prompts/src/PromptUtils.sys.mjs
index 7a15802b84..8c1b0ff992 100644
--- a/toolkit/components/prompts/src/PromptUtils.sys.mjs
+++ b/toolkit/components/prompts/src/PromptUtils.sys.mjs
@@ -76,6 +76,12 @@ export var EnableDelayHelper = function ({
   this.focusTarget.addEventListener("keydown", this, true);
   this.focusTarget.document.addEventListener("unload", this);
 
+  // If we're not part of the active window, don't even start the timer yet.
+  let topWin = focusTarget.browsingContext.top.window;
+  if (topWin != Services.focus.activeWindow) {
+    return;
+  }
+
   this.startOnFocusDelay();
 };
 
diff --git a/toolkit/components/reputationservice/ApplicationReputation.cpp b/toolkit/components/reputationservice/ApplicationReputation.cpp
index cc4045d5ad..8973fc85bb 100644
--- a/toolkit/components/reputationservice/ApplicationReputation.cpp
+++ b/toolkit/components/reputationservice/ApplicationReputation.cpp
@@ -519,20 +519,20 @@ const char* const ApplicationReputationService::kBinaryFileExtensions[] = {
     ".xlam",  // MS Excel
     ".xldm",  // MS Excel
     //".xll", exec  // MS Excel
-    ".xlm",     // MS Excel
-    ".xls",     // MS Excel
-    ".xlsb",    // MS Excel
-    ".xlsm",    // MS Excel
-    ".xlsx",    // MS Excel
-    ".xlt",     // MS Excel
-    ".xltm",    // MS Excel
-    ".xltx",    // MS Excel
-    ".xlw",     // MS Excel
-    ".xml",     // MS Excel
-    ".xnk",     // MS Exchange
-    ".xrm-ms",  // Windows
-    ".xsd",     // XML schema definition
-    ".xsl",     // XML Stylesheet
+    ".xlm",   // MS Excel
+    ".xls",   // MS Excel
+    ".xlsb",  // MS Excel
+    ".xlsm",  // MS Excel
+    ".xlsx",  // MS Excel
+    ".xlt",   // MS Excel
+    ".xltm",  // MS Excel
+    ".xltx",  // MS Excel
+    ".xlw",   // MS Excel
+    ".xml",   // MS Excel
+    ".xnk",   // MS Exchange
+    //".xrm-ms", exec // Windows
+    ".xsd",  // XML schema definition
+    ".xsl",  // XML Stylesheet
     //".xxe",
     ".xz",     // Linux archive (xz)
     ".z",      // InstallShield
diff --git a/toolkit/components/reputationservice/ApplicationReputation.h b/toolkit/components/reputationservice/ApplicationReputation.h
index f708c6eb71..5ea5b825f7 100644
--- a/toolkit/components/reputationservice/ApplicationReputation.h
+++ b/toolkit/components/reputationservice/ApplicationReputation.h
@@ -27,9 +27,9 @@ class ApplicationReputationService final
  public:
   static const char* const kNonBinaryExecutables[5];
 #ifdef XP_WIN
-  static const char* const kBinaryFileExtensions[185];
-#else
   static const char* const kBinaryFileExtensions[184];
+#else
+  static const char* const kBinaryFileExtensions[183];
 #endif
 
   static already_AddRefed<ApplicationReputationService> GetSingleton();
diff --git a/toolkit/crashreporter/breakpad-client/mac/handler/minidump_generator.cc b/toolkit/crashreporter/breakpad-client/mac/handler/minidump_generator.cc
index e13e4509b0..64c01bdce4 100644
--- a/toolkit/crashreporter/breakpad-client/mac/handler/minidump_generator.cc
+++ b/toolkit/crashreporter/breakpad-client/mac/handler/minidump_generator.cc
@@ -83,7 +83,7 @@ MinidumpGenerator::MinidumpGenerator()
       cpu_type_(DynamicImages::GetNativeCPUType()),
       dyldImageLoadAddress_(NULL),
       dyldSlide_(0),
-      dyldPath_(),
+      dyldPath_(nullptr),
       task_context_(NULL),
       dynamic_images_(NULL),
       memory_blocks_(&allocator_) {
@@ -105,7 +105,7 @@ MinidumpGenerator::MinidumpGenerator(mach_port_t crashing_task,
       cpu_type_(DynamicImages::GetNativeCPUType()),
       dyldImageLoadAddress_(NULL),
       dyldSlide_(0),
-      dyldPath_(),
+      dyldPath_(nullptr),
       task_context_(NULL),
       dynamic_images_(NULL),
       memory_blocks_(&allocator_) {
@@ -250,7 +250,7 @@ void MinidumpGenerator::GatherCurrentProcessDyldInformation() {
     return;
   }
   dyldImageLoadAddress_ = mh;
-  dyldPath_ = string(aii->dyldPath);
+  dyldPath_ = aii->dyldPath;
   dyldSlide_ = GetCurrentProcessModuleSlide(mh, aii->sharedCacheSlide);
 }
 
@@ -1464,7 +1464,7 @@ bool MinidumpGenerator::WriteModuleStream(unsigned int index,
     if (index == INT_MAX) {
       dyld_or_in_dyld_shared_cache = true;
       slide = dyldSlide_;
-      name = dyldPath_.c_str();
+      name = dyldPath_;
     } else {
       dyld_or_in_dyld_shared_cache =
         ((header->flags & MH_SHAREDCACHE) != 0);
@@ -1993,7 +1993,7 @@ bool MinidumpGenerator::WriteCrashInfoStream(
       bool dyld_or_in_dyld_shared_cache;
       if (i == image_count - 1) {
         slide = dyldSlide_;
-        module_path = dyldPath_.c_str();
+        module_path = dyldPath_;
         dyld_or_in_dyld_shared_cache = true;
       } else {
         slide = _dyld_get_image_vmaddr_slide(i);
@@ -2048,7 +2048,10 @@ bool MinidumpGenerator::WriteBootargsStream(
   int rv = sysctlbyname("kern.bootargs", NULL, &size, NULL, 0);
   if ((rv != 0) || (size == 0))
     size = 1;
-  vector<uint8_t> bootargs(size);
+
+  wasteful_vector<uint8_t> bootargs(&this->allocator_, size);
+  bootargs.resize(size, 0);
+
   bootargs[0] = 0;
   if (rv == 0)
     sysctlbyname("kern.bootargs", &bootargs[0], &size, NULL, 0);
diff --git a/toolkit/crashreporter/breakpad-client/mac/handler/minidump_generator.h b/toolkit/crashreporter/breakpad-client/mac/handler/minidump_generator.h
index aba067cc04..77c250ccd5 100644
--- a/toolkit/crashreporter/breakpad-client/mac/handler/minidump_generator.h
+++ b/toolkit/crashreporter/breakpad-client/mac/handler/minidump_generator.h
@@ -266,7 +266,8 @@ class MinidumpGenerator {
   // process has crashed.
   breakpad_mach_header* dyldImageLoadAddress_;
   ptrdiff_t dyldSlide_;
-  string dyldPath_;
+  // We don't own this pointer, this is owned by macOS internal structures.
+  const char* dyldPath_;
 
   // Context of the task to dump.
   breakpad_ucontext_t *task_context_;
diff --git a/toolkit/modules/GMPInstallManager.sys.mjs b/toolkit/modules/GMPInstallManager.sys.mjs
index 9cb4802e58..421a843c71 100644
--- a/toolkit/modules/GMPInstallManager.sys.mjs
+++ b/toolkit/modules/GMPInstallManager.sys.mjs
@@ -43,6 +43,16 @@ const LOCAL_GMP_SOURCES = [
   },
 ];
 
+function getLocalSources() {
+  if (GMPPrefs.getBool(GMPPrefs.KEY_ALLOW_LOCAL_SOURCES, true)) {
+    return LOCAL_GMP_SOURCES;
+  }
+
+  let log = getScopedLogger("GMPInstallManager.downloadLocalConfig");
+  log.info("ignoring local sources");
+  return [];
+}
+
 function downloadJSON(uri) {
   let log = getScopedLogger("GMPInstallManager.checkForAddons");
   log.info("fetching config from: " + uri);
@@ -70,7 +80,7 @@ function downloadJSON(uri) {
 function downloadLocalConfig() {
   let log = getScopedLogger("GMPInstallManager.downloadLocalConfig");
   return Promise.all(
-    LOCAL_GMP_SOURCES.map(conf => {
+    getLocalSources().map(conf => {
       return downloadJSON(conf.src).then(addons => {
         let platforms = addons.vendors[conf.id].platforms;
         let target = Services.appinfo.OS + "_" + lazy.UpdateUtils.ABI;
@@ -146,6 +156,36 @@ GMPInstallManager.prototype = {
   },
 
   /**
+   * Determines the root to use for verifying content signatures.
+   * @param url
+   *        The Balrog URL, i.e. the return value of _getURL().
+   */
+  _getContentSignatureRootForURL(url) {
+    // The prod and stage URLs of Balrog are documented at:
+    // https://mozilla-balrog.readthedocs.io/en/latest/infrastructure.html
+    // Note: we are matching by prefix without the full domain nor slash, to
+    // enable us to move to a different host name in the future if desired.
+    if (url.startsWith("https://aus")) {
+      return Ci.nsIContentSignatureVerifier.ContentSignatureProdRoot;
+    }
+    if (url.startsWith("https://stage.")) {
+      return Ci.nsIContentSignatureVerifier.ContentSignatureStageRoot;
+    }
+    if (Services.env.exists("XPCSHELL_TEST_PROFILE_DIR")) {
+      return Ci.nsIX509CertDB.AppXPCShellRoot;
+    }
+    // When content signature verification for GMP was added (bug 1714621), a
+    // pref existed to configure an arbitrary root, which enabled local testing.
+    // This pref was removed later in bug 1769669, and replaced with hard-coded
+    // roots (prod and tests only). Support for testing against the stage server
+    // was restored in bug 1771992.
+    // Note: other verifiers ultimately fall back to ContentSignatureLocalRoot,
+    // to support local development. Here we use ContentSignatureProdRoot to
+    // minimize risk (and the unclear demand for "local" development).
+    return Ci.nsIContentSignatureVerifier.ContentSignatureProdRoot;
+  },
+
+  /**
    * Records telemetry results on if fetching update.xml from Balrog succeeded
    * when content signature was used to verify the response from Balrog.
    * @param didGetAddonList
@@ -318,15 +358,17 @@ GMPInstallManager.prototype = {
     }
 
     let url = await this._getURL();
+    let trustedContentSignatureRoot = this._getContentSignatureRootForURL(url);
 
     log.info(
-      `Fetching product addon list url=${url}, allowNonBuiltIn=${allowNonBuiltIn}, certs=${certs}, checkContentSignature=${checkContentSignature}`
+      `Fetching product addon list url=${url}, allowNonBuiltIn=${allowNonBuiltIn}, certs=${certs}, checkContentSignature=${checkContentSignature}, trustedContentSignatureRoot=${trustedContentSignatureRoot}`
     );
     let addonPromise = ProductAddonChecker.getProductAddonList(
       url,
       allowNonBuiltIn,
       certs,
-      checkContentSignature
+      checkContentSignature,
+      trustedContentSignatureRoot
     )
       .then(res => {
         if (checkContentSignature) {
diff --git a/toolkit/modules/GMPUtils.sys.mjs b/toolkit/modules/GMPUtils.sys.mjs
index 488a024d13..c21576e0a9 100644
--- a/toolkit/modules/GMPUtils.sys.mjs
+++ b/toolkit/modules/GMPUtils.sys.mjs
@@ -124,6 +124,7 @@ export var GMPPrefs = {
   KEY_PLUGIN_ABI: "media.{0}.abi",
   KEY_PLUGIN_FORCE_SUPPORTED: "media.{0}.forceSupported",
   KEY_PLUGIN_ALLOW_X64_ON_ARM64: "media.{0}.allow-x64-plugin-on-arm64",
+  KEY_ALLOW_LOCAL_SOURCES: "media.gmp-manager.allowLocalSources",
   KEY_URL: "media.gmp-manager.url",
   KEY_URL_OVERRIDE: "media.gmp-manager.url.override",
   KEY_CERT_CHECKATTRS: "media.gmp-manager.cert.checkAttributes",
diff --git a/toolkit/modules/tests/xpcshell/test_GMPInstallManager.js b/toolkit/modules/tests/xpcshell/test_GMPInstallManager.js
index 87de57efaf..e755690e6c 100644
--- a/toolkit/modules/tests/xpcshell/test_GMPInstallManager.js
+++ b/toolkit/modules/tests/xpcshell/test_GMPInstallManager.js
@@ -802,6 +802,60 @@ add_task(async function test_checkForAddons_contentSignatureFailure() {
 });
 
 /**
+ * Tests that the signature verification URL is as expected.
+ */
+add_task(async function test_checkForAddons_get_verifier_url() {
+  const previousUrlOverride = setupContentSigTestPrefs();
+
+  let installManager = new GMPInstallManager();
+  // checkForAddons() calls _getContentSignatureRootForURL() with the return
+  // value of _getURL(), which is effectively KEY_URL_OVERRIDE or KEY_URL
+  // followed by some normalization.
+  const rootForUrl = async () => {
+    const url = await installManager._getURL();
+    return installManager._getContentSignatureRootForURL(url);
+  };
+
+  Assert.equal(
+    await rootForUrl(),
+    Ci.nsIX509CertDB.AppXPCShellRoot,
+    "XPCShell root used by default in xpcshell test"
+  );
+
+  const defaultPrefs = Services.prefs.getDefaultBranch("");
+  const defaultUrl = defaultPrefs.getStringPref(GMPPrefs.KEY_URL);
+  Preferences.set(GMPPrefs.KEY_URL_OVERRIDE, defaultUrl);
+  Assert.equal(
+    await rootForUrl(),
+    Ci.nsIContentSignatureVerifier.ContentSignatureProdRoot,
+    "Production cert should be used for the default Balrog URL: " + defaultUrl
+  );
+
+  // The current Balrog endpoint is at aus5.mozilla.org. Confirm that the prod
+  // cert is used even if we bump the version (e.g. aus6):
+  const potentialProdUrl = "https://aus1337.mozilla.org/potential/prod/URL";
+  Preferences.set(GMPPrefs.KEY_URL_OVERRIDE, potentialProdUrl);
+  Assert.equal(
+    await rootForUrl(),
+    Ci.nsIContentSignatureVerifier.ContentSignatureProdRoot,
+    "Production cert should be used for: " + potentialProdUrl
+  );
+
+  // Stage URL documented at https://mozilla-balrog.readthedocs.io/en/latest/infrastructure.html
+  const stageUrl = "https://stage.balrog.nonprod.cloudops.mozgcp.net/etc.";
+  Preferences.set(GMPPrefs.KEY_URL_OVERRIDE, stageUrl);
+  Assert.equal(
+    await rootForUrl(),
+    Ci.nsIContentSignatureVerifier.ContentSignatureStageRoot,
+    "Stage cert should be used with the stage URL: " + stageUrl
+  );
+
+  installManager.uninit();
+
+  revertContentSigTestPrefs(previousUrlOverride);
+});
+
+/**
  * Tests that checkForAddons() works as expected when certificate pinning
  * checking is enabled. We plan to move away from cert pinning in favor of
  * content signature checks, but part of doing this is comparing the telemetry
diff --git a/toolkit/mozapps/extensions/internal/ProductAddonChecker.sys.mjs b/toolkit/mozapps/extensions/internal/ProductAddonChecker.sys.mjs
index 1615a551c8..f76ebf0d30 100644
--- a/toolkit/mozapps/extensions/internal/ProductAddonChecker.sys.mjs
+++ b/toolkit/mozapps/extensions/internal/ProductAddonChecker.sys.mjs
@@ -118,12 +118,18 @@ async function conservativeFetch(input) {
  * @param  contentSignatureHeader
  *         The contents of the 'content-signature' header received along with
  *         `data`.
+ * @param  trustedRoot
+ *         The identifier of the trusted root to use for certificate validation.
  * @return A promise that will resolve to nothing if the signature verification
  *         succeeds, or rejects on failure, with an Error that sets its
  *         addonCheckerErr property disambiguate failure cases and a message
  *         explaining the error.
  */
-async function verifyGmpContentSignature(data, contentSignatureHeader) {
+async function verifyGmpContentSignature(
+  data,
+  contentSignatureHeader,
+  trustedRoot
+) {
   if (!contentSignatureHeader) {
     logger.warn(
       "Unexpected missing content signature header during content signature validation"
@@ -186,13 +192,6 @@ async function verifyGmpContentSignature(data, contentSignatureHeader) {
     "@mozilla.org/security/contentsignatureverifier;1"
   ].createInstance(Ci.nsIContentSignatureVerifier);
 
-  // See bug 1771992. In the future, this may need to handle staging and dev
-  // environments in addition to just production and testing.
-  let root = Ci.nsIContentSignatureVerifier.ContentSignatureProdRoot;
-  if (Services.env.exists("XPCSHELL_TEST_PROFILE_DIR")) {
-    root = Ci.nsIX509CertDB.AppXPCShellRoot;
-  }
-
   let valid;
   try {
     valid = await verifier.asyncVerifyContentSignature(
@@ -200,7 +199,7 @@ async function verifyGmpContentSignature(data, contentSignatureHeader) {
       signature,
       certChain,
       "aus.content-signature.mozilla.org",
-      root
+      trustedRoot
     );
   } catch (err) {
     logger.warn(`Unexpected error while validating content signature: ${err}`);
@@ -329,6 +328,9 @@ function downloadXMLWithRequest(
  * @param  verifyContentSignature
  *         When true, will verify the content signature information from the
  *         response header. Failure to verify will result in an error.
+ * @param  trustedContentSignatureRoot
+ *         The trusted root to use for certificate validation.
+ *         Must be set if verifyContentSignature is true.
  * @return a promise that resolves to the DOM document downloaded or rejects
  *         with a JS exception in case of error.
  */
@@ -336,7 +338,8 @@ async function downloadXML(
   url,
   allowNonBuiltIn = false,
   allowedCerts = null,
-  verifyContentSignature = false
+  verifyContentSignature = false,
+  trustedContentSignatureRoot = null
 ) {
   let request = await downloadXMLWithRequest(
     url,
@@ -346,7 +349,8 @@ async function downloadXML(
   if (verifyContentSignature) {
     await verifyGmpContentSignature(
       request.response,
-      request.getResponseHeader("content-signature")
+      request.getResponseHeader("content-signature"),
+      trustedContentSignatureRoot
     );
   }
   return request.responseXML;
@@ -535,6 +539,9 @@ export const ProductAddonChecker = {
    * @param  verifyContentSignature
    *         When true, will verify the content signature information from the
    *         response header. Failure to verify will result in an error.
+   * @param  trustedContentSignatureRoot
+   *         The trusted root to use for certificate validation.
+   *         Must be set if verifyContentSignature is true.
    * @return a promise that resolves to an object containing the list of add-ons
    *         and whether the local fallback was used, or rejects with a JS
    *         exception in case of error. In the case of an error, a best effort
@@ -545,13 +552,15 @@ export const ProductAddonChecker = {
     url,
     allowNonBuiltIn = false,
     allowedCerts = null,
-    verifyContentSignature = false
+    verifyContentSignature = false,
+    trustedContentSignatureRoot = null
   ) {
     return downloadXML(
       url,
       allowNonBuiltIn,
       allowedCerts,
-      verifyContentSignature
+      verifyContentSignature,
+      trustedContentSignatureRoot
     ).then(parseXML);
   },
 
diff --git a/toolkit/mozapps/extensions/test/xpcshell/test_ProductAddonChecker_signatures.js b/toolkit/mozapps/extensions/test/xpcshell/test_ProductAddonChecker_signatures.js
index 5ae61568ef..93602ffac9 100644
--- a/toolkit/mozapps/extensions/test/xpcshell/test_ProductAddonChecker_signatures.js
+++ b/toolkit/mozapps/extensions/test/xpcshell/test_ProductAddonChecker_signatures.js
@@ -98,7 +98,8 @@ add_task(async function test_valid_content_signature() {
       signedBaseUri + goodXmlPath + "?" + validSignatureQuery,
       /*allowNonBuiltIn*/ false,
       /*allowedCerts*/ false,
-      /*verifyContentSignature*/ true
+      /*verifyContentSignature*/ true,
+      /*trustedContentSignatureRoot*/ Ci.nsIX509CertDB.AppXPCShellRoot
     );
     Assert.ok(true, "Should successfully get addon list");
 
@@ -122,7 +123,8 @@ add_task(async function test_invalid_content_signature() {
       signedBaseUri + goodXmlPath + "?" + invalidSignatureQuery,
       /*allowNonBuiltIn*/ false,
       /*allowedCerts*/ false,
-      /*verifyContentSignature*/ true
+      /*verifyContentSignature*/ true,
+      /*trustedContentSignatureRoot*/ Ci.nsIX509CertDB.AppXPCShellRoot
     );
     Assert.ok(false, "Should fail to get addon list");
   } catch (e) {
@@ -143,7 +145,8 @@ add_task(async function test_missing_content_signature_header() {
       signedBaseUri + goodXmlPath + "?" + missingSignatureQuery,
       /*allowNonBuiltIn*/ false,
       /*allowedCerts*/ false,
-      /*verifyContentSignature*/ true
+      /*verifyContentSignature*/ true,
+      /*trustedContentSignatureRoot*/ Ci.nsIX509CertDB.AppXPCShellRoot
     );
     Assert.ok(false, "Should fail to get addon list");
   } catch (e) {
@@ -165,7 +168,8 @@ add_task(async function test_incomplete_content_signature_header() {
       signedBaseUri + goodXmlPath + "?" + incompleteSignatureQuery,
       /*allowNonBuiltIn*/ false,
       /*allowedCerts*/ false,
-      /*verifyContentSignature*/ true
+      /*verifyContentSignature*/ true,
+      /*trustedContentSignatureRoot*/ Ci.nsIX509CertDB.AppXPCShellRoot
     );
     Assert.ok(false, "Should fail to get addon list");
   } catch (e) {
@@ -187,7 +191,8 @@ add_task(async function test_bad_x5u_content_signature_header() {
       signedBaseUri + goodXmlPath + "?" + badX5uSignatureQuery,
       /*allowNonBuiltIn*/ false,
       /*allowedCerts*/ false,
-      /*verifyContentSignature*/ true
+      /*verifyContentSignature*/ true,
+      /*trustedContentSignatureRoot*/ Ci.nsIX509CertDB.AppXPCShellRoot
     );
     Assert.ok(false, "Should fail to get addon list");
   } catch (e) {
diff --git a/toolkit/xre/nsAppRunner.cpp b/toolkit/xre/nsAppRunner.cpp
index 14b8c98dc8..ec23a4d39f 100644
--- a/toolkit/xre/nsAppRunner.cpp
+++ b/toolkit/xre/nsAppRunner.cpp
@@ -4206,7 +4206,9 @@ int XREMain::XRE_mainInit(bool* aExitFlag) {
 
 #if defined(MOZ_SANDBOX) && defined(XP_WIN)
   if (mAppData->sandboxBrokerServices) {
-    SandboxBroker::Initialize(mAppData->sandboxBrokerServices);
+    nsAutoString binDirPath;
+    MOZ_ALWAYS_SUCCEEDS(xreBinDirectory->GetPath(binDirPath));
+    SandboxBroker::Initialize(mAppData->sandboxBrokerServices, binDirPath);
   } else {
 #  if defined(MOZ_SANDBOX)
     // If we're sandboxing content and we fail to initialize, then crashing here
diff --git a/toolkit/xre/nsEmbedFunctions.cpp b/toolkit/xre/nsEmbedFunctions.cpp
index e3d975ca18..d2cc2506aa 100644
--- a/toolkit/xre/nsEmbedFunctions.cpp
+++ b/toolkit/xre/nsEmbedFunctions.cpp
@@ -529,7 +529,7 @@ nsresult XRE_InitChildProcess(int aArgc, char* aArgv[],
 #if defined(XP_WIN)
 #  if defined(MOZ_SANDBOX)
   if (aChildData->sandboxBrokerServices) {
-    SandboxBroker::Initialize(aChildData->sandboxBrokerServices);
+    SandboxBroker::Initialize(aChildData->sandboxBrokerServices, u""_ns);
     SandboxBroker::GeckoDependentInitialize();
   }
 #  endif  // defined(MOZ_SANDBOX)