Bypass naive WebRTC blocking

[upsuper]

This can bypass the Chrome extension "WebRTC Block".

[upsuper]

Ping?

[diafygi]

Sorry for the delay, I wanted to reach out to the WebRTC Block developers and give them a few days to update their extension. However, I have not heard back, so I will merge this pull request. Thanks!

[upsuper]

Actually, I don't think it is possible to fix this problem in a Chrome extension.

[ghost]

It appears to me that rebuilding chromium with -Denable_webrtc=0 is the real way to disable WebRTC. (haven't tested yet)

[fippo]

@upsuper should be possible by adding

      "all_frames": true,
      "match_about_blank": true,

to the content_scripts section in the extension manifest. That way, the content script is executed on about:blank iframes as well.

[upsuper]

@fippo I don't think so. I don't think the browser should run any other script when one piece of script is running.

[fippo]

@upsuper take the webrtcblock source from chromes extension directory, modify the manifest.json as indicated, import it as your own extension. breaks the (awesome) iframe hack for me.

[upsuper]

@fippo then I just need to specify iframe.sandbox = 'allow-same-origin' in addition, the content script will be bypassed again :)

[upsuper]

@diafygi you probably could also add the code I just mentioned above to the detection script.

[diafygi]

Pull request please? Please update both the README.md and the index.html.

[upsuper]

OK, I'll do it later. It seems I can't change two files in one commit on Github directly.

[ZimTester]

@upsuper On newest versions of Chrome iframe.sandbox = 'allow-same-origin' doesn't bypass this @fippo's way anymore, adding

   "content_scripts": [ {
      "all_frames": true,
      "match_about_blank": true,

in manifest.json is really break this webrtc-ips, tested on latest Chromium LKGR build for Win: #9662
(chrome version: 43.0.2314.0)

P.S. Also you can modify

      "matches": [ "http://*/*", "https://*/*" ],

to

      "matches": [ "http://*/*", "https://*/*", "file://*/*" ],

for a quick local check / for blocking from local host(s) files too.

[Piseth6655]

cf559b5