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.

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

What could be causing Youtube to stop working in Firefox, giving just a black box instead of a video?

  • 1 reply
  • 12 have this problem
  • 30 views
  • Last reply by James

more options

Whenever I try to view any video on Youtube in Firefox, I get an empty black box instead of a video. There are no buttons etc, nothing at all. If I right click, a grey box appears with "About Flash..." and "movie not loaded".

Youtube works fine in Internet Explorer, and I've tried uninstalling and reinstalling Flash and Shockwave. I'm on a laptop running Windows 7 Home Premium, SP1, 32 bit, and Firefox 5.0.

Any ideas?

Andy

Whenever I try to view any video on Youtube in Firefox, I get an empty black box instead of a video. There are no buttons etc, nothing at all. If I right click, a grey box appears with "About Flash..." and "movie not loaded". Youtube works fine in Internet Explorer, and I've tried uninstalling and reinstalling Flash and Shockwave. I'm on a laptop running Windows 7 Home Premium, SP1, 32 bit, and Firefox 5.0. Any ideas? Andy

All Replies (1)

more options

Try clearing the Cache in Firefox.

Tools-> Clear Recent History -> [v] Cache

or Tools->Options->Advanced->Network -> Offline storage -> [Clear Now]

Youtube may have made some changes recently. Clear the Youtube cookie and refresh page if above does not do it.

Modified by James