Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

YouTube is choppy when played fullscreen

  • 2 respostas
  • 21 have this problem
  • 4 views
  • Last reply by cor-el

more options

This is Flash video -- when I play an HTML5 video, it's smooth (even at 1080p).

Vimeo & Hulu play smoothly in full-screen.

If the YouTube Flash video is embedded on a non-YouTube page, it's still choppy when made fullscreen.

IMPORTANT NOTE: Flash YouTube videos play full-screen smoothly in Chrome.

I have tried unchecking the "Enable hardware acceleration" box (with no success).

This is Flash video -- when I play an HTML5 video, it's smooth (even at 1080p). Vimeo & Hulu play smoothly in full-screen. If the YouTube Flash video is embedded on a non-YouTube page, it's still choppy when made fullscreen. IMPORTANT NOTE: Flash YouTube videos play full-screen smoothly in Chrome. I have tried unchecking the "Enable hardware acceleration" box (with no success).

All Replies (2)

more options

Recent crashes of certain multimedia contents (this includes Youtube videos, certain flash games and other applications) in conjunction with Firefox are most probably caused by a recent Flash update and/or a malfunctioning browser plugin such as Real Player.

In order to remedy the problem, please perform the steps mentioned in these Knowledge Base articles:

Other, more technical information about these issues can be found under these Links:


Please tell us if this helped!

more options

This is about Flash on Linux, so protected mode and other Windows issues do not apply.
The last version for Flash is 11.2.x and Adobe only provides security updates for this version.
Google Chrome uses different pepper Flash version on Linux that is still being updated just like the Windows version.