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

Why does embedded YouTube video play in splitscreen format?

  • 2 replies
  • 1 has this problem
  • 8 views
  • Paskiausią atsakymą parašė cor-el

more options

On my blog, I embedded a YouTube video. Using Google Chrome, it plays fine. Using FireFox it plays split screen, left and right (see screenshot image). I haven't installed or updated any software, so this seems like a FireFox / HTML problem. Anyone have any similar problems? Solutions? Thanks.

On my blog, I embedded a YouTube video. Using Google Chrome, it plays fine. Using FireFox it plays split screen, left and right (see screenshot image). I haven't installed or updated any software, so this seems like a FireFox / HTML problem. Anyone have any similar problems? Solutions? Thanks.
Pridėtos ekrano nuotraukos

All Replies (2)

more options

Another user reported the same problem. But when I checked it out, the video played normally.

If you have problems with current Shockwave Flash plugin versions then check this:

  • see if there are updates for your graphics drive drivers

https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

  • disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)

https://forums.adobe.com/message/4468493#TemporaryWorkaround

  • disable hardware acceleration in the Flash plugin

https://forums.adobe.com/thread/891337 See also:


Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options)
key, and then starting Firefox. Is the problem still there?


Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Then in the reply box at the bottom of this page, do a right click in the box and select Paste. This will show us your system details. No Personal Information Is Collected.

more options

Could be that you have enabled two pane 3D view for the YouTube media player, so check this via the settings (gear icon).