Videos will not play within Firefox
I get the message; "Your browser does not currently recognize any of the video formats available." when trying to play videos within Firefox. Currently using Firefox 57.0 (64-bit), and have tried to update plugins with no success. Videos were playing within Firefox before being updated to this version. How can I get videos to play again? And what do I need to do to get them to play within Firefox again? Please respond, and help me get videos to playing again. Thanks, Chad
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What kinda of video are they?
Could you also check this support article: Fix video and audio problems on Firefox for Windows N editions.
Mostly mp4, flv, webm, and maybe others. Can play most through RealPlayer, but cannot play through Firefox as before.
See also the YouTube test page to check support in Firefox for playing HTML5 media.