Open up Help > Troubleshooting Information, then hit the Show Folder button.

Folder name is \gmp-gmpopenh264 then open the \1.1 folder. File name is gmp-gmpopenh264.dll. Delete that file and that Plugin should be gone.

You can set the media.gmp-gmpopenh264.provider.enabled pref to false on the about:config page.

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

• http://kb.mozillazine.org/about:config

Hello the-edmeister,

thanks for your support and your answer.

If I would delete the file gmp-gmpopenh264.dll, it should solve this problem for first, but if mozilla updates a new firefox version, it seems to be there for the next time, and I appreciate to have not this plugin on my PC. I think this is something unusual for a serious firefox user, that for every time for new, this file gmp-gmpopenh264.dll have to be deleted, if I do not want to have it on my PC. But I prefer not to have this file gmp-gmpopenh264.dll automatically installed. If someone is interested in to install this file gmp-gmpopenh264.dll for using it, there should be another way to download and to install, but not to have it automatically on a PC, and to read somewhere in internet, that this file is something about adware or malware.

I want to please mozilla.support, not to install this file gmp-gmpopenh264.dll anymore with forthcoming updates.

Thank you.

Hello cor-el,

thanks for your support and your answer.

If I would delete the file gmp-gmpopenh264.dll, it should solve this problem for first, but if mozilla updates a new firefox version, it seems to be there for the next time, and I appreciate to have not this plugin on my PC. I think this is something unusual for a serious firefox user, that for every time for new, this file gmp-gmpopenh264.dll have to be deleted, if I do not want to have it on my PC. But I prefer not to have this file gmp-gmpopenh264.dll automatically installed. If someone is interested in to install this file gmp-gmpopenh264.dll for using it, there should be another way to download and to install, but not to have it automatically on a PC, and to read somewhere in internet, that this file is something about adware or malware.

I want to please mozilla.support, not to install this file gmp-gmpopenh264.dll anymore with forthcoming updates.

Thank you.

This openH264 plugin is currently only used for WebRTC and not for playing videos.

• http://andreasgal.com/2014/10/14/openh264-now-in-firefox/

Hello cor-el,

I am not interested in openH264 plugin.

I think it would be better, if someone is interested in installing this openH264 plugin, that mozilla.org would offer it like all other addons or plugins at mozilla.org, and it would not be installed automatically.

kind regards pemigabo123