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

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Firefox suddenly stopped playing youtube videos. How do I fix this?

  • 2 àwọn èsì
  • 125 ní àwọn ìṣòro yìí
  • 4 views
  • Èsì tí ó kẹ́hìn lọ́wọ́ Sped2001

Sped2001
Sped2001
more options

Windows 7 64 bit. Firefox 3.6.15. Youtube had been playing fine here for a year. Suddenly the videos do not play. They do fine in IE. Loading a youtube video produces a blank screen where the video should be, and the error console is filled with messages like this:

Warning: Error in parsing value for 'filter'. Declaration dropped. Source File: http://s.ytimg.com/yt/cssbin/www-core-vfldtJIUN.css Line: 1


Have uninstalled/reinstalled flashplayer and Firefox to no avail. Everything was fine until just recently.

Any ideas?

Windows 7 64 bit. Firefox 3.6.15. Youtube had been playing fine here for a year. Suddenly the videos do not play. They do fine in IE. Loading a youtube video produces a blank screen where the video should be, and the error console is filled with messages like this: Warning: Error in parsing value for 'filter'. Declaration dropped. Source File: http://s.ytimg.com/yt/cssbin/www-core-vfldtJIUN.css Line: 1 Have uninstalled/reinstalled flashplayer and Firefox to no avail. Everything was fine until just recently. Any ideas?

All Replies (2)

TonyE
TonyE
  • Moderator
more options

Answers in this forum have shown different things have worked for different people.

For some disabling hardware acceleration for Flash helps. To do that right-click on a Flash video, select Settings, go to the first tab of the settings for the option to enable/disable hardware acceleration for Flash. This is something recommended by YouTube for those having problems - http://www.google.com/support/youtube/bin/answer.py?&answer=1209379

Clearing YouTube cookies and the cache has also helped some. For details of how to do that see https://support.mozilla.com/kb/Deleting+cookies and https://support.mozilla.com/kb/How+to+clear+the+cache

Others had to go a step further after deleting YouTube cookies and block YouTube from saving cookies. In the Tools menu select Options to open the Options window. Go to the Privacy panel and make sure it is set to "Use custom setting for history". Click the Exceptions button, type in http://www.youtube.com and click on Block

You can also try changing to the secure YouTube site, https://www.youtube.com

Sped2001
Sped2001 Ìbéèrè olóhun
more options

Clearing cookies and cache did it. Thanks a ton.