diff --git a/dom/media/test/manifest.js b/dom/media/test/manifest.js
index 08c88010b21f..9db940ef7719 100644
--- a/dom/media/test/manifest.js
+++ b/dom/media/test/manifest.js
@@ -631,15 +631,6 @@ var gUnseekableTests = [
   { name:"bogus.duh", type:"bogus/duh"}
 ];
 
-function isWindows32() {
-    return navigator.userAgent.includes("Windows") &&
-        !navigator.userAgent.includes("Win64");
-}
-
-function isAndroid() {
-    return navigator.userAgent.includes("Android");
-}
-
 var androidVersion = -1; // non-Android platforms
 if (manifestNavigator().userAgent.includes("Mobile") ||
     manifestNavigator().userAgent.includes("Tablet")) {
@@ -1868,11 +1859,6 @@ function mediaTestCleanup(callback) {
     SpecialPowers.exactGC(callback);
 }
 
-// B2G emulator and Android 2.3 are condidered slow platforms
-function isSlowPlatform() {
-  return SpecialPowers.Services.appinfo.name == "B2G" || getAndroidVersion() == 10;
-}
-
 async function dumpDebugInfoForToken(token) {
   for (let v of document.getElementsByTagName("video")) {
     if (token === v.token) {
diff --git a/dom/media/test/test_playback.html b/dom/media/test/test_playback.html
index 55e9bd1960e8..d82e4f074926 100644
--- a/dom/media/test/test_playback.html
+++ b/dom/media/test/test_playback.html
@@ -98,20 +98,6 @@ function startTest(test, token) {
 
   document.body.appendChild(v);
   v.play();
-
-  // Debug timeouts on slow platforms.
-  if (isSlowPlatform()) {
-    var events = ["suspend", "play", "canplay", "canplaythrough", "loadstart", "loadedmetadata",
-                  "loadeddata", "playing", "ended", "error", "stalled", "emptied", "abort",
-                  "waiting", "pause"];
-    function logEvent(e) {
-      var v = e.target;
-      Log(e.target.token, "got " + e.type);
-    }
-    events.forEach(function(e) {
-      v.addEventListener(e, logEvent);
-    });
-  }
 }
 
 manager.runTests(gPlayTests, startTest);
diff --git a/dom/media/test/test_playback_hls.html b/dom/media/test/test_playback_hls.html
index 72d6cf1bceec..553c8d253eba 100644
--- a/dom/media/test/test_playback_hls.html
+++ b/dom/media/test/test_playback_hls.html
@@ -81,20 +81,6 @@ function startTest(test, token) {
 
   document.body.appendChild(v);
   v.play();
-
-  // Log the event on android devices or emulator for debugging.
-  if (isSlowPlatform()) {
-    var events = ["suspend", "play", "canplay", "canplaythrough", "loadstart","loadedmetadata",
-                  "loadeddata", "playing", "ended", "error", "stalled", "emptied", "abort",
-                  "waiting", "pause"];
-    function logEvent(e) {
-      var v = e.target;
-      Log(e.target.token, "got " + e.type);
-    }
-    events.forEach(function(e) {
-      v.addEventListener(e, logEvent);
-    });
-  }
 }
 
 manager.runTests(gHLSTests, startTest);
diff --git a/dom/media/test/test_playback_reactivate.html b/dom/media/test/test_playback_reactivate.html
index 3f76b5f739fd..cfbc6f493251 100644
--- a/dom/media/test/test_playback_reactivate.html
+++ b/dom/media/test/test_playback_reactivate.html
@@ -67,20 +67,6 @@ function startTest(test, token) {
   v.addEventListener("ended", checkEnded);
 
   document.body.appendChild(v);
-
-  // Debug timeouts on slow platforms.
-  if (isSlowPlatform()) {
-    var events = ["suspend", "play", "canplay", "canplaythrough", "loadstart", "loadedmetadata",
-                  "loadeddata", "playing", "ended", "error", "stalled", "emptied", "abort",
-                  "waiting", "pause"];
-    function logEvent(e) {
-      var v = e.target;
-      Log(e.target.token, "got " + e.type);
-    }
-    events.forEach(function(e) {
-      v.addEventListener(e, logEvent);
-    });
-  }
 }
 
 manager.runTests(gSmallTests, startTest);