diff --git a/dom/base/crashtests/crashtests.list b/dom/base/crashtests/crashtests.list
index d451d93848..40d358b38a 100644
--- a/dom/base/crashtests/crashtests.list
+++ b/dom/base/crashtests/crashtests.list
@@ -209,6 +209,6 @@ load 1230422.html
 load 1251361.html
 load 1304437.html
 pref(clipboard.autocopy,true) load 1385272-1.html
-pref(dom.webcomponents.customelements.enabled,true) load 1341693.html
+pref(dom.webcomponents.enabled,true) load 1341693.html
 pref(dom.webcomponents.enabled,true) load 1419799.html
 pref(dom.webcomponents.enabled,false) load 1422931.html
diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index d28b34f3df..c0d81a41e0 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -593,7 +593,7 @@ nsContentUtils::Init()
                                "dom.webcomponents.enabled", false);
 
   Preferences::AddBoolVarCache(&sIsCustomElementsEnabled,
-                               "dom.webcomponents.customelements.enabled", false);
+                               "dom.webcomponents.enabled", false);
 
   Preferences::AddBoolVarCache(&sEncodeDecodeURLHash,
                                "dom.url.encode_decode_hash", false);
diff --git a/dom/tests/mochitest/webcomponents/test_bug1276240.html b/dom/tests/mochitest/webcomponents/test_bug1276240.html
index ded8d82763..33e532a6a7 100644
--- a/dom/tests/mochitest/webcomponents/test_bug1276240.html
+++ b/dom/tests/mochitest/webcomponents/test_bug1276240.html
@@ -47,7 +47,7 @@ test();
 // test with webcomponents disabled
 SimpleTest.waitForExplicitFinish();
 SpecialPowers.pushPrefEnv(
-  { 'set': [["dom.webcomponents.customelements.enabled", false]]}, runTest);
+  { 'set': [["dom.webcomponents.enabled", false]]}, runTest);
 
 </script>
 </pre>
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 1e346b463a..f43eae5de9 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1250,7 +1250,6 @@ pref("dom.event.clipboardevents.enabled",   true);
 pref("dom.event.highrestimestamp.enabled",  true);
 
 pref("dom.webcomponents.enabled",           false);
-pref("dom.webcomponents.customelements.enabled", false);
 
 pref("javascript.enabled",                  true);
 // Enable Array.prototype.values
diff --git a/testing/profiles/prefs_general.js b/testing/profiles/prefs_general.js
index 960cbda15a..c90806a4d1 100644
--- a/testing/profiles/prefs_general.js
+++ b/testing/profiles/prefs_general.js
@@ -57,7 +57,6 @@ user_pref("media.gmp-manager.updateEnabled", false);
 user_pref("dom.w3c_touch_events.enabled", 1);
 user_pref("layout.accessiblecaret.enabled_on_touch", false);
 user_pref("dom.webcomponents.enabled", true);
-user_pref("dom.webcomponents.customelements.enabled", true);
 user_pref("dom.htmlimports.enabled", true);
 // Existing tests assume there is no font size inflation.
 user_pref("font.size.inflation.emPerLine", 0);
@@ -329,4 +328,4 @@ user_pref("plugin.load_flash_only", false);
 // cannot easily be upgraded.
 user_pref("media.libavcodec.allow-obsolete", true);
 
-user_pref("media.openUnsupportedTypeWithExternalApp", false);
\ No newline at end of file
+user_pref("media.openUnsupportedTypeWithExternalApp", false);