Issue 6692 - Update frame structure for about:blank frames earlier

ext/background.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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 243 matching lines @@
     }
 
     updatePageFrameStructure(details.frameId, details.tabId, details.url,
                              details.parentFrameId);
   },
   {types: ["main_frame", "sub_frame"], urls: ["http://*/*", "https://*/*"]},
   ["responseHeaders"]);
 
   browser.webNavigation.onBeforeNavigate.addListener(details =>
   {
-    // Since we can only listen for HTTP(S) responses using
-    // webRequest.onHeadersReceived we must update the page structure here for
-    // other navigations.
-    let {url} = details;
-    if (!(url.startsWith("http:") ||

[Sebastian Noack, 2018/05/29 16:48:48]

Wouldn't checking for "about:blank" be sufficient here?

[kzar, 2018/05/29 17:28:12]

Yep, seems to work. Done.

-          url.startsWith("https:") &&
-          // Chrome doesn't dispatch webRequest.onHeadersReceived
-          // for Web Store URLs.
-          // https://crrev.com/76882bf/extensions/common/extension_urls.cc#33
-          !url.startsWith("https://chrome.google.com/webstore/")))
-    {
-      updatePageFrameStructure(details.frameId, details.tabId, url,
+    // Requests can be made by about:blank frames before the frame's
+    // onCommitted event has fired, so we update the frame structure
+    // for those now.
+    if (details.url == "about:blank")
+    {
+      updatePageFrameStructure(details.frameId, details.tabId, details.url,
                                details.parentFrameId);
     }
   });
 
   browser.webNavigation.onCommitted.addListener(details =>
   {
-    // For navigations which the previous two listeners missed -
-    // including documents cached by Service Workers - we must now
-    // update the frame structure. However, since this event fires
-    // last we must be careful to not update the state of the same
-    // document twice, otherwise the number of any ads blocked already
-    // and any recorded sitekey could get lost.
+    // We have to update the frame structure for documents that weren't
+    // loaded over HTTP (including documents cached by Service Workers),
+    // when the navigation occurs. However, we must be careful to not
+    // update the state of the same document twice, otherewise the number
+    // of any ads blocked already and any recorded sitekey could get lost.
     let frame = ext.getFrame(details.tabId, details.frameId);
     if (!frame || frame.url.href != details.url)
     {
       updatePageFrameStructure(details.frameId, details.tabId, details.url,
                                details.parentFrameId);
     }
   });
 
   function forgetTab(tabId)
   {
@@ skipping 291 matching lines @@
           return frames.get(0) || null;
         }
       };
     }
 
     return ext.onMessage._dispatch(
       message, sender, sendResponse
     ).includes(true);
   });
 }