diff --git a/background.js b/background.js
index 2bb02a8d..8fbffe2a 100644
--- a/background.js
+++ b/background.js
@@ -144,8 +144,8 @@ function getApplicableSections(style, url) {
 }
 
 function sectionAppliesToUrl(section, url) {
-	// only http, https, and file allowed
-	if (url.indexOf("http") != 0 && url.indexOf("file") != 0) {
+	// only http, https, file, and chrome-extension allowed
+	if (url.indexOf("http") != 0 && url.indexOf("file") != 0 && url.indexOf("chrome-extension") != 0) {
 		return false;
 	}
 	if (!section.urls && !section.domains && !section.urlPrefixes && !section.regexps) {
diff --git a/edit.html b/edit.html
index 4effcdc5..ebfadde4 100644
--- a/edit.html
+++ b/edit.html
@@ -89,6 +89,7 @@
 		<script src="storage.js"></script>
 		<script src="messaging.js"></script>
 		<script src="localization.js"></script>
+		<script src="apply.js"></script>
 	</head>
 	<body id="stylish-edit">
 		<div id="header">
diff --git a/manage.html b/manage.html
index a2cc8ec2..6e9cac57 100644
--- a/manage.html
+++ b/manage.html
@@ -88,6 +88,7 @@
 		<script src="health.js"></script>
 		<script src="storage.js"></script>
 		<script src="messaging.js"></script>
+		<script src="apply.js"></script>
 	</head>
 	<body id="stylish-manage">
 
diff --git a/popup.html b/popup.html
index ebac3416..062a8fcd 100644
--- a/popup.html
+++ b/popup.html
@@ -41,6 +41,7 @@
 		<script src="health.js"></script>
 		<script src="storage.js"></script>
 		<script src="messaging.js"></script>
+		<script src="apply.js"></script>
 </head>
 <body id="stylish-popup">
 
diff --git a/popup.js b/popup.js
index 497f3c5e..e278788e 100644
--- a/popup.js
+++ b/popup.js
@@ -5,7 +5,7 @@ var writeStyleTemplate = document.createElement("a");
 writeStyleTemplate.className = "write-style-link";
 
 chrome.tabs.getSelected(null, function(tab) {
-	var urlWillWork = /^(file|http|https):.*/.test(tab.url);
+	var urlWillWork = /^(file|http|https|chrome\-extension):.*/.test(tab.url);
 
 	if (!urlWillWork) {
 		["installed", "find-styles", "write-style"].forEach(function(id) {
