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Manually Install OpenH264 codec for Firefox

December 6, 2014 by Alex

This post will show you how to install the OpenH264 Video Codec in Firefox. It is very useful for installing it when Firefox fails to do so automatically or for fine tuning your version.

Openh264 will be installed shortly

The solution I found, by referencing a previous profile, is as follows:

  • Download a relevant release here: https://github.com/cisco/openh264/blob/master/RELEASES
  • Open with archiver and extract the .dll to %appdata%/mozilla/firefox/profiles/xxxxx.default/gmp-gmpopenh264/1.2 (change 1.2 to desired version)
  • Rename to gmpopenh264.dll
  • Create a new file in that directory called gmpopenh264.info , edit this file and put this info in there:
    Name: gmpopenh264
    Description: GMP Plugin for OpenH264.
    Version: 1.2
    APIs: encode-video[h264], decode-video[h264]
  • Open prefs.js in the firefox user folder and add
    user_pref("media.gmp-gmpopenh264.version", "1.2");

After following these steps you will have the OpenH264 codec enabled.

OpenH264 Video Codec Updated
OpenH264 Video Codec Updated

 

Category: ArticlesTag: firefox, Tutorial
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Reader Interactions

Comments

  1. Haikal

    February 18, 2015 at 4:37 PM

    thanks!

    Reply
  2. Luigiantonio Calò

    May 13, 2015 at 2:37 AM

    The only one guide that works well thanks!

    Reply
  3. bhuwan

    July 11, 2016 at 3:55 AM

    how ..i didn’t understand plz help me

    Reply
    • Alex

      July 11, 2016 at 12:08 PM

      I literally wrote a step by step instruction, what sort of help are you expecting?

      Reply
  4. Adam

    April 26, 2017 at 7:54 AM

    I don’t see any download link on that github page.

    Reply
    • Alex

      April 26, 2017 at 1:16 PM

      I looked on the page and all the download links are there. If your eyes can’t see it press ctrl+f and put http://ciscobinary.openh264.org or refer to this visual graphic I’ve created:

      http://i.imgur.com/K4LGkXW.png

      Reply
  5. ravenpl

    April 24, 2022 at 5:42 AM

    Did it but FF got it all removed on start. Rocky Linux 8 FF 91.8.0esr

    Reply

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