performance: prevent mutation observers from firing on pages other than AMO

Author: lemon-juice

source/content/frame-script.js

@@ -83,7 +83,7 @@ var amoBr = {
   },
 
   registerEvents: function() {
-    // start observing link changes after document is created before page scripts
+    // start observing link changes after document is created
     this.documentInitObserver = {
         observe: function(aSubject, aTopic, aData) {
           if ("document-element-inserted" == aTopic) {
@@ -170,10 +170,13 @@ var amoBr = {
     //amoBr.grabbedLinks = [];
 
     var observer = new content.MutationObserver(function(mutations) {
+      if (content.document.location.host != 'addons.mozilla.org'
+          || content.document.location.protocol != 'https:') {
+        // quit if not AMO
+        return;
+      }
 
-      for (var m=0; m<mutations.length; m++) {
-        var mutation = mutations[m];
-        
+      mutations.forEach(function(mutation) {
         var target = mutation.target;
 
         if (target.nodeName == 'A'
@@ -182,7 +185,7 @@ var amoBr = {
           target.setAttribute('data-realurl', mutation.oldValue);
           //amoBr.grabbedLinks.push(mutation.oldValue);
         }
-      }    
+      });
     });
 
     var target = content.document;
@@ -195,6 +198,12 @@ var amoBr = {
   //  wrapper.innerHTML = this.grabbedLinks.join('<br>\n');
   //  content.document.body.insertBefore(wrapper, content.document.body.firstChild);
   //},
+  //
+  //appendDebug: function(txt) {
+  //  var wrapper = content.document.createElement('div');
+  //  wrapper.textContent = txt;
+  //  content.document.body.insertBefore(wrapper, content.document.body.firstChild);
+  //},
 
   addStyleSheet: function() {
     var link = content.document.createElement('link');

source/install.rdf

@@ -3,7 +3,7 @@
          xmlns:em="http://www.mozilla.org/2004/em-rdf#">
   <rdf:Description rdf:about="urn:mozilla:install-manifest">
     <em:id>[email protected]</em:id>
-    <em:version>0.9.14</em:version>
+    <em:version>0.9.15</em:version>
     <em:type>2</em:type>
     <em:bootstrap>true</em:bootstrap>