Search Support

Beware of phishing attacks: Mozilla will never ask you to call a number or visit a non-Mozilla website. Please ignore such requests.

Learn More

Youtube most often does not load its stylesheet.

  • 3 replies
  • 2 have this problem
  • 6 views
  • Last reply by cor-el

more options

When I go to YT, almost always, the stylesheet does not load. When I go to see what's the problem in developer mode, it says:

"Stylesheet could not be loaded. https:/s.ytimg.com/yts/cssbin/www-core-vflgYCqoq.css"

I have tried clearing the cookies and cache over 5 times and each time it never works. I have tried flushing the dns, but to no avail. Sometimes, the website just never loads. It just says: "Server not found Firefox can't find the server at www.youtube.com." This has also been happening on Google Chrome and it is the main reason why I switched to using Firefox. I need help. I cannot watch videos at all.

Modified by IDONTKNO

All Replies (3)

more options

can you upload to me a video who describe your problem, and wish add-on is running on your browser, can you also try it again and disable your firewall, thanks :)

more options

I'm sorry I have no idea what you are saying

more options

You can check for recently installed suspicious or unknown extensions.


Do a malware check with several malware scanning programs on the Windows computer. Please scan with all programs because each program detects different malware. All these programs have free versions.

Make sure that you update each program to get the latest version of their databases before doing a scan.

You can also do a check for a rootkit infection with TDSSKiller.

See also: