Issue 4210 - Fix dynamic-frame collapsing in Chrome

lib/requestBlocker.js

Index: lib/requestBlocker.js
diff --git a/lib/requestBlocker.js b/lib/requestBlocker.js
index bb7e482e108dfb6d82778364b349a752a8cd4f99..2a3ad9dce95dcb6142254c546ff9900478e29b23 100644
--- a/lib/requestBlocker.js
+++ b/lib/requestBlocker.js
@@ -79,16 +79,25 @@ ext.webRequest.onBeforeRequest.addListener((url, type, page, frame) =>
 
 port.on("filters.collapse", (message, sender) =>
 {
-  if (checkWhitelisted(sender.page, sender.frame))
+  var sender_frame = sender.frame;
+  if (message.dynamicFrameURL)
+  {
+    sender_frame = {
+      url: new URL(message.dynamicFrameURL,  message.baseURL),
+      parent: sender.frame
+    };
+  }
+
+  if (checkWhitelisted(sender.page, sender_frame))
     return false;
 
   let typeMask = RegExpFilter.typeMap[message.mediatype];
-  let documentHost = extractHostFromFrame(sender.frame);
-  let sitekey = getKey(sender.page, sender.frame);
+  let documentHost = extractHostFromFrame(sender_frame);
+  let sitekey = getKey(sender.page, sender_frame);
   let blocked = false;
 
   let specificOnly = checkWhitelisted(
-    sender.page, sender.frame,
+    sender.page, sender_frame,
     RegExpFilter.typeMap.GENERICBLOCK
   );