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

FF stops responding while watching fullscreen video

  • 2 cavab
  • 2 have this problem
  • 8 views
  • Last reply by Klemik

more options

The problem appears often, about 4 out of 5 times, when watching fullscreen flash video (eg on youtube) and then clicking external link (opened in new tab on ff). Not sure if that's flash or ff bug. Using flash 11.3 and ff 16, gonna update ff and flash and I'll update info if the problem is solved as I read 11.3 crashes often.

The problem appears often, about 4 out of 5 times, when watching fullscreen flash video (eg on youtube) and then clicking external link (opened in new tab on ff). Not sure if that's flash or ff bug. Using flash 11.3 and ff 16, gonna update ff and flash and I'll update info if the problem is solved as I read 11.3 crashes often.

All Replies (2)

more options

Your system details list shows two Flash plugins.

  1. Shockwave Flash 11.5 r502
  2. Shockwave Flash 11.3 r300

You should remove the latter.


You can check for problems caused by recent Flash updates and try these:

  • disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
  • disable protected mode in Flash 11.3 and later
  • disable hardware acceleration in the Flash plugin
more options

I have updated FF and Flash and everything seems fine now. Sorry for trouble and thanks for a reply.