diff --git a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired.toml b/browser/base/content/test/tabcrashed/browser_aboutRestartRequired.toml
index 8f8648d81074..d0d3ede5a265 100644
--- a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired.toml
+++ b/browser/base/content/test/tabcrashed/browser_aboutRestartRequired.toml
@@ -9,15 +9,3 @@ prefs = [
 ]
 
 ["browser_aboutRestartRequired_basic.js"]
-
-# Bug 1876056: re-enable once bug 1877361 is fixed
-#["browser_aboutRestartRequired_buildid_false-positive.js"]
-#skip-if = ["win11_2009 && msix && debug"]  # bug 1823581
-
-# Bug 1888355: re-enable once bug 1877361 is fixed
-#["browser_aboutRestartRequired_buildid_mismatch.js"]
-#skip-if = ["win11_2009 && msix && debug"]  # bug 1823581
-
-# Bug 1888355: re-enable once bug 1877361 is fixed
-#["browser_aboutRestartRequired_buildid_no-platform-ini.js"]
-#skip-if = ["win11_2009 && msix && debug"]  # bug 1823581
diff --git a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_false-positive.js b/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_false-positive.js
index 15e0b5ab312f..4321700a7aa4 100644
--- a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_false-positive.js
+++ b/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_false-positive.js
@@ -17,7 +17,6 @@ add_task(async function test_browser_crashed_false_positive_event() {
     "Build ID mismatch false positive count should be undefined"
   );
 
-  ok(await ensureBuildID(), "System has correct platform.ini");
   setBuildidMatchDontSendEnv();
   await forceCleanProcesses();
   let eventPromise = getEventPromise("oop-browser-crashed", "false-positive");
diff --git a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_mismatch.js b/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_mismatch.js
deleted file mode 100644
index 80f35db159f6..000000000000
--- a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_mismatch.js
+++ /dev/null
@@ -1,56 +0,0 @@
-"use strict";
-
-// On debug builds, crashing tabs results in much thinking, which
-// slows down the test and results in intermittent test timeouts,
-// so we'll pump up the expected timeout for this test.
-requestLongerTimeout(2);
-
-SimpleTest.expectChildProcessCrash();
-
-add_task(async function test_browser_restartrequired_event() {
-  info("Waiting for oop-browser-buildid-mismatch event.");
-
-  Services.telemetry.clearScalars();
-  is(
-    getFalsePositiveTelemetry(),
-    undefined,
-    "Build ID mismatch false positive count should be undefined"
-  );
-
-  ok(await ensureBuildID(), "System has correct platform.ini");
-
-  let profD = Services.dirsvc.get("GreD", Ci.nsIFile);
-  let platformIniOrig = await IOUtils.readUTF8(
-    PathUtils.join(profD.path, "platform.ini")
-  );
-  let buildID = Services.appinfo.platformBuildID;
-  let platformIniNew = platformIniOrig.replace(buildID, "1234");
-
-  await IOUtils.writeUTF8(
-    PathUtils.join(profD.path, "platform.ini"),
-    platformIniNew,
-    { flush: true }
-  );
-
-  setBuildidMatchDontSendEnv();
-  await forceCleanProcesses();
-  let eventPromise = getEventPromise(
-    "oop-browser-buildid-mismatch",
-    "buildid-mismatch"
-  );
-  let tab = await openNewTab(false);
-  await eventPromise;
-  await IOUtils.writeUTF8(
-    PathUtils.join(profD.path, "platform.ini"),
-    platformIniOrig,
-    { flush: true }
-  );
-  unsetBuildidMatchDontSendEnv();
-
-  is(
-    getFalsePositiveTelemetry(),
-    undefined,
-    "Build ID mismatch false positive count should be undefined"
-  );
-  await closeTab(tab);
-});
diff --git a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_no-platform-ini.js b/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_no-platform-ini.js
deleted file mode 100644
index 232c79b02e83..000000000000
--- a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_buildid_no-platform-ini.js
+++ /dev/null
@@ -1,50 +0,0 @@
-"use strict";
-
-// On debug builds, crashing tabs results in much thinking, which
-// slows down the test and results in intermittent test timeouts,
-// so we'll pump up the expected timeout for this test.
-requestLongerTimeout(2);
-
-SimpleTest.expectChildProcessCrash();
-
-add_task(async function test_browser_crashed_no_platform_ini_event() {
-  info("Waiting for oop-browser-buildid-mismatch event.");
-
-  Services.telemetry.clearScalars();
-  is(
-    getFalsePositiveTelemetry(),
-    undefined,
-    "Build ID mismatch false positive count should be undefined"
-  );
-
-  ok(await ensureBuildID(), "System has correct platform.ini");
-
-  let profD = Services.dirsvc.get("GreD", Ci.nsIFile);
-  let platformIniOrig = await IOUtils.readUTF8(
-    PathUtils.join(profD.path, "platform.ini")
-  );
-
-  await IOUtils.remove(PathUtils.join(profD.path, "platform.ini"));
-
-  setBuildidMatchDontSendEnv();
-  await forceCleanProcesses();
-  let eventPromise = getEventPromise(
-    "oop-browser-buildid-mismatch",
-    "no-platform-ini"
-  );
-  let tab = await openNewTab(false);
-  await eventPromise;
-  await IOUtils.writeUTF8(
-    PathUtils.join(profD.path, "platform.ini"),
-    platformIniOrig,
-    { flush: true }
-  );
-  unsetBuildidMatchDontSendEnv();
-
-  is(
-    getFalsePositiveTelemetry(),
-    undefined,
-    "Build ID mismatch false positive count should be undefined"
-  );
-  await closeTab(tab);
-});
diff --git a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_noForkServer.toml b/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_noForkServer.toml
index ddb49a0e2631..fff10d050aa6 100644
--- a/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_noForkServer.toml
+++ b/browser/base/content/test/tabcrashed/browser_aboutRestartRequired_noForkServer.toml
@@ -10,13 +10,6 @@ prefs = [
 ]
 
 # Bug 1876056: remove once bug 1877361 is fixed
+
 ["browser_aboutRestartRequired_buildid_false-positive.js"]
 skip-if = ["win11_2009 && msix && debug"]  # bug 1823581
-
-# Bug 1888355: re-enable once bug 1877361 is fixed
-["browser_aboutRestartRequired_buildid_mismatch.js"]
-skip-if = ["win11_2009 && msix && debug"]  # bug 1823581
-
-# Bug 1888355: re-enable once bug 1877361 is fixed
-["browser_aboutRestartRequired_buildid_no-platform-ini.js"]
-skip-if = ["win11_2009 && msix && debug"]  # bug 1823581
diff --git a/browser/base/content/test/tabcrashed/head.js b/browser/base/content/test/tabcrashed/head.js
index b4e913701221..d79697a2a009 100644
--- a/browser/base/content/test/tabcrashed/head.js
+++ b/browser/base/content/test/tabcrashed/head.js
@@ -171,15 +171,6 @@ function getEventPromise(eventName, eventKind) {
   });
 }
 
-async function ensureBuildID() {
-  let profD = Services.dirsvc.get("GreD", Ci.nsIFile);
-  let platformIniOrig = await IOUtils.readUTF8(
-    PathUtils.join(profD.path, "platform.ini")
-  );
-  let buildID = Services.appinfo.platformBuildID;
-  return platformIniOrig.indexOf(buildID) > 0;
-}
-
 async function openNewTab(forceCrash) {
   const PAGE =
     "data:text/html,<html><body>A%20regular,%20everyday,%20normal%20page.";