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

lib/requestBlocker.js

Index: lib/requestBlocker.js
===================================================================
--- a/lib/requestBlocker.js
+++ b/lib/requestBlocker.js
@@ -64,27 +64,37 @@
       thirdParty, sitekey,
       specificOnly, filter
     );
   }
 }
 
 ext.webRequest.onBeforeRequest.addListener((url, type, page, frame) =>
 {
-  if (checkWhitelisted(page, frame))
-    return true;
+  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);
-  let docDomain = extractHostFromFrame(frame);
-  let thirdParty = isThirdParty(url, docDomain);
-  let sitekey = getKey(page, frame);
 
-  let specificOnly = !!checkWhitelisted(
-    page, frame, RegExpFilter.typeMap.GENERICBLOCK
+  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
   );

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

Nit: You added one level off indentation to the code above, but not to this
closing parentheses.

Alternatively, this function call could be indented like below, but up to you:

  specificOnly = !!checkWhitelisted(page, frame, 
                                    RegExpFilter.typeMap.GENERICBLOCK);

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

I will do it as you suggest. 

+  }
+
+
 
   let mappedType = resourceTypes.get(type) || "OTHER";
 
   let filter = defaultMatcher.matchesAny(
     urlString, RegExpFilter.typeMap[mappedType],
     docDomain, thirdParty, sitekey, specificOnly
   );