Audit gstreamer usage for proxy safety

In Firefox30, the Linux builds began using gstreamer by default for displaying HTML5 video. We need to make sure gstreamer is just used for codecs, and not any network activity.

added MikePerry201409 TorBrowserTeam201410 component::applications/tor browser ff31-esr owner::mikeperry priority::high resolution::fixed status::closed type::defect labels

I will look at this, but it could probably use another set of eyes and/or some mbox testing.

Trac:
Status: new to assigned
Cc: N/A to boklm
Keywords: N/A deleted, MikePerry201409 added
Owner: tbb-team to mikeperry

Trac:
Cc: boklm to boklm, gk

Trac:
Keywords: TorBrowserTeam201409 deleted, TorBrowserTeam201410 added

Ok, I took a look at this, and it looks like all HTML5 media elements ultimately use ChannelMediaResource, which is owned by the MediaDecoder. nsIChannel is the underlying type of all of these channels, which is proxied. It does not look like gstreamer or any of the other codec support libraries are capable of doing their own streaming.

The only exception I can see is the RtspMediaResource, which should only be used on FirefoxOS.

Trac:
Status: assigned to closed
Resolution: N/A to fixed

closed

mentioned in issue #13543 (moved)

mentioned in issue #18782 (moved)

moved to tpo/applications/tor-browser#13020 (closed)