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"no video with supported format and mime type" after updating to FF v25

  • 1 reply
  • 94 have this problem
  • 2 views
  • Last reply by cor-el

so yeah, after the latest update to v25, some sites are starting to get the above message. however, when using chrome, it works perfectly.

so yeah, after the latest update to v25, some sites are starting to get the above message. however, when using chrome, it works perfectly.

Chosen solution

This can happen if websites use a video tag to use the built-in HTML5 media player and use a format that Firefox doesn't supports.
On Windows XP this can happen more easily.


  • bug 799318 - [meta] Support H.264/AAC/MP3 video/audio playback on desktop Firefox

Please do not comment in bug reports: https://bugzilla.mozilla.org/page.cgi?id=etiquette.html

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Chosen Solution

This can happen if websites use a video tag to use the built-in HTML5 media player and use a format that Firefox doesn't supports.
On Windows XP this can happen more easily.


  • bug 799318 - [meta] Support H.264/AAC/MP3 video/audio playback on desktop Firefox

Please do not comment in bug reports: https://bugzilla.mozilla.org/page.cgi?id=etiquette.html