From Fedora Project Wiki

This page contains information on the Cisco OpenH264 firefox plugin.


Cisco provides a binary version of a OpenH264 plugin for firefox. This plugin is needed for WebRTC along with other H264 decoding. This binary is released under this agreement from Cisco:

Upstream firefox versions download and install this plugin by default automatically. Due to it's binary nature, Fedora disables this automatic download.


Source for this plugin is available at under a BSD license.

Manual install of binary

Example installation for version 1.1:

mkdir -p ~/.mozilla/firefox/<yourprofile>/gmp-gmpopenh264/1.1/
cd ~/.mozilla/firefox/<yourprofile>/gmp-gmpopenh264/1.1/
unzip ~/

Firefox config changes

Type about:config into the Firefox address/URL field and accept the warning.

  • From the Search field type in 264 and a handful of options will appear. Give the following Preference Names a value of true by double-clicking on false:
  • Restart Firefox
  • After restarting, the following string in about:config will change to the current version that has been installed from the web: