diff --git a/src/js/tech/html5.js b/src/js/tech/html5.js
index af0a5481ec..a8e2accdf7 100644
--- a/src/js/tech/html5.js
+++ b/src/js/tech/html5.js
@@ -1321,7 +1321,7 @@ const mp4RE = /^video\/mp4/i;
 
 Html5.patchCanPlayType = function() {
   // Android 4.0 and above can play HLS to some extent but it reports being unable to do so
-  if (browser.ANDROID_VERSION >= 4.0) {
+  if (browser.ANDROID_VERSION >= 4.0 && !browser.IS_FIREFOX) {
     if (!canPlayType) {
       canPlayType = Html5.TEST_VID.constructor.prototype.canPlayType;
     }
diff --git a/test/unit/tech/html5.test.js b/test/unit/tech/html5.test.js
index 63f058a2c4..270d879f7a 100644
--- a/test/unit/tech/html5.test.js
+++ b/test/unit/tech/html5.test.js
@@ -110,10 +110,12 @@ QUnit.test('patchCanPlayType patches canplaytype with our function, conditionall
   Html5.unpatchCanPlayType();
 
   const oldAV = browser.ANDROID_VERSION;
+  const oldIsFirefox = browser.IS_FIREFOX;
   const video = document.createElement('video');
   const canPlayType = Html5.TEST_VID.constructor.prototype.canPlayType;
 
   browser.ANDROID_VERSION = 4.0;
+  browser.IS_FIREFOX = false;
   Html5.patchCanPlayType();
 
   assert.notStrictEqual(video.canPlayType,
@@ -131,14 +133,39 @@ QUnit.test('patchCanPlayType patches canplaytype with our function, conditionall
                     'patched canPlayType and function returned from unpatch are equal');
 
   browser.ANDROID_VERSION = oldAV;
+  browser.IS_FIREFOX = oldIsFirefox;
+  Html5.unpatchCanPlayType();
+});
+
+QUnit.test('patchCanPlayType doesn\'t patch canplaytype with our function in Firefox for Android', function(assert) {
+  // the patch runs automatically so we need to first unpatch
+  Html5.unpatchCanPlayType();
+
+  const oldAV = browser.ANDROID_VERSION;
+  const oldIsFirefox = browser.IS_FIREFOX;
+  const video = document.createElement('video');
+  const canPlayType = Html5.TEST_VID.constructor.prototype.canPlayType;
+
+  browser.ANDROID_VERSION = 4.0;
+  browser.IS_FIREFOX = true;
+  Html5.patchCanPlayType();
+
+  assert.strictEqual(video.canPlayType,
+                 canPlayType,
+                 'original canPlayType and patched canPlayType should be equal');
+
+  browser.ANDROID_VERSION = oldAV;
+  browser.IS_FIREFOX = oldIsFirefox;
   Html5.unpatchCanPlayType();
 });
 
 QUnit.test('should return maybe for HLS urls on Android 4.0 or above', function(assert) {
   const oldAV = browser.ANDROID_VERSION;
+  const oldIsFirefox = browser.IS_FIREFOX;
   const video = document.createElement('video');
 
   browser.ANDROID_VERSION = 4.0;
+  browser.IS_FIREFOX = false;
   Html5.patchCanPlayType();
 
   assert.strictEqual(video.canPlayType('application/x-mpegurl'),
@@ -157,6 +184,7 @@ QUnit.test('should return maybe for HLS urls on Android 4.0 or above', function(
                     'maybe for vnd.apple.mpegurl');
 
   browser.ANDROID_VERSION = oldAV;
+  browser.IS_FIREFOX = oldIsFirefox;
   Html5.unpatchCanPlayType();
 });