Search Support

Beware of phishing attacks: Mozilla will never ask you to call a number or visit a non-Mozilla website. Please ignore such requests.

Learn More

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Many youtube videos will not play in Firefox - I get the error message - "no video with supported format and MIME type found"

  • 3 uphendule
  • 1 inale nkinga
  • 39 views
  • Igcine ukuphendulwa ngu cor-el

more options

this is a recent problem - the videos play in Chrome and Explorer, but not in Firefox

All Replies (3)

more options

hello, please try to refresh firefox and see if this can address the issue...

more options
more options

This happens if Firefox uses the HTML5 media player and can't play the media file.

Detecting Playback (HTMLMediaElement.prototype.canPlayType):