Issue 5042 - Adds handling for requests which are not associated with browser tab

lib/requestBlocker.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 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 53 matching lines @@
       thirdParty, sitekey,
       specificOnly, filter
     );
   }
 }
 
 ext.webRequest.onBeforeRequest.addListener((url, type, page, frame) =>
 {
   let docDomain = null;
   let sitekey = null;
-
   let specificOnly = false;

[Sebastian Noack, 2017/05/30 11:10:49]

Nit: The blank line above looks redundant, but instead I think a blank line
above the if-statement would improve readability.

[Jon Sonesen, 2017/05/31 08:28:18]

Acknowledged.

   let thirdParty = false;
   let urlString = stringifyURL(url);
+
 
   if (frame && page)
   {
     if (checkWhitelisted(page, frame))
       return true;
 
     docDomain = extractHostFromFrame(frame);
     sitekey = getKey(page, frame);
     thirdParty = isThirdParty(url, docDomain);
-    specificOnly = !!checkWhitelisted(
-      page, frame, RegExpFilter.typeMap.GENERICBLOCK
-  );
+    specificOnly = !!checkWhitelisted(page, frame,
+                                      RegExpFilter.typeMap.GENERICBLOCK);
   }
-
-
 
   let mappedType = resourceTypes.get(type) || "OTHER";
 
   let filter = defaultMatcher.matchesAny(
     urlString, RegExpFilter.typeMap[mappedType],
     docDomain, thirdParty, sitekey, specificOnly
   );
 
   setTimeout(onBeforeRequestAsync, 0, page, urlString,
                                       mappedType, docDomain,
@@ skipping 89 matching lines @@
   if (msg.requestType.toUpperCase() in chrome.webRequest.ResourceType)
     return false;
 
   return ext.webRequest.onBeforeRequest._dispatch(
      new URL(msg.url),
      msg.requestType,
      sender.page,
      sender.frame
   ).includes(false);
 });