I am using apache server on linux and want to run a .webm video file. I have .webm video file which i am trying to run in firefox (V 12.0) using HTML5 but the browser is showing as "no video with supported format and MIME types found". I have added mime type in httpd.conf file. The video is running in chrome on windows machine which is a client machine. Please tell, if any configuration settings are required.

  • Umm, Firefox 12? Is there a reason you're using such an ancient version? – HalosGhost Nov 10 '14 at 12:35

Visit https://www.youtube.com/html5?

you will have something like:

enter image description here

1) Open the Firefox browser and type the following in the address bar:


A warning page may appear that says "This might void your warranty!". Click "I'll be careful, I promise!" to continue to the about:config page.

2) Type the word: media.fragmented-mp4 in the filter text box. There are 5 parameters disabled.Keep the last one false and double click on the 4 others to change its value to true.

3)Type media.mediasource in the filter text box and set all values to true.

Restart firfox and visit https://www.youtube.com/html5?

you will get something like:

enter image description here

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