This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

You Tube videos and html5

bombadil
bombadil
more options

You Tube says I can't play the last video of my online art class because my browser (Firefox) will not support it due to html5 issues. I was able to play the other videos without a problem. How can this be fixed?

You Tube says I can't play the last video of my online art class because my browser (Firefox) will not support it due to html5 issues. I was able to play the other videos without a problem. How can this be fixed?

All Replies (1)

Mark Schmidt
Mark Schmidt
more options

Firefox does not support some video types which use non-free video codecs (MSE & WebM VP9). Unfortunately Google has disabled falling back to flash video when it detects users are using Firefox.

If you have Flash installed you can switch to Flash video on YouTube using an add-on like https://addons.mozilla.org/en-US/firefox/addon/youtube-flash-video-player/

This should let you play the video in Firefox.

Modified by Mark Schmidt