Issue 3541, issue 3489 - Don't attempt to process chrome:// and resource:// events to avoid trigger…

lib/child/contentPolicy.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 261 matching lines @@
   //
   // nsIContentPolicy interface implementation
   //
 
   shouldLoad: function(contentType, contentLocation, requestOrigin, node, mimeTypeGuess, extra)
   {
     // Ignore requests without context and top-level documents
     if (!node || contentType == Ci.nsIContentPolicy.TYPE_DOCUMENT)
       return Ci.nsIContentPolicy.ACCEPT;
 
+    // Bail out early for chrome: an resource: URLs, this is a work-around for
+    // https://bugzil.la/1127744 and https://bugzil.la/1247640
+    let location = Utils.unwrapURL(contentLocation);
+    if (location.schemeIs("chrome") || location.schemeIs("resource"))
+      return Ci.nsIContentPolicy.ACCEPT;
+
     // Ignore standalone objects
     if (contentType == Ci.nsIContentPolicy.TYPE_OBJECT && node.ownerDocument && !/^text\/|[+\/]xml$/.test(node.ownerDocument.contentType))
       return Ci.nsIContentPolicy.ACCEPT;
 
     let wnd = Utils.getWindow(node);
     if (!wnd)
       return Ci.nsIContentPolicy.ACCEPT;
 
     // Data loaded by plugins should be associated with the document
     if (contentType == Ci.nsIContentPolicy.TYPE_OBJECT_SUBREQUEST && node instanceof Ci.nsIDOMElement)
       node = node.ownerDocument;
 
     // Fix type for objects misrepresented as frames or images
     if (contentType != Ci.nsIContentPolicy.TYPE_OBJECT && (node instanceof Ci.nsIDOMHTMLObjectElement || node instanceof Ci.nsIDOMHTMLEmbedElement))
       contentType = Ci.nsIContentPolicy.TYPE_OBJECT;
 
-    let location = Utils.unwrapURL(contentLocation);
     let result = shouldAllow(wnd, node, types.get(contentType), location.spec);
     return (result ? Ci.nsIContentPolicy.ACCEPT : Ci.nsIContentPolicy.REJECT_REQUEST);
   },
 
   shouldProcess: function(contentType, contentLocation, requestOrigin, insecNode, mimeType, extra)
   {
     return Ci.nsIContentPolicy.ACCEPT;
   },
 
   //
@@ skipping 171 matching lines @@
         let property = (hasCols ? "cols" : "rows");
         let weights = parentNode[property].split(",");
         weights[index] = "0";
         parentNode[property] = weights.join(",");
       }
     }
     else
       node.classList.add(collapsedClass);
   }
 }