Disable Gecko Media Plugins in Abrowser
Firefox just added support for OpenH264, and it downloads the plugin from Cisco: http://andreasgal.com/2014/10/14/openh264-now-in-firefox/. Although the plugin is free, it's downloading a binary from Cisco, which is an issue. It's useless anyway since we have GStreamer support enabled by default.
Please apply Parabola's patch to disable it: https://projects.parabola.nu/abslibre.git/tree/libre/iceweasel/non-openh264.patch.