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

"mswsock.dll" causing firefox to crash, how to fix?

  • 1 reply
  • 141 have this problem
  • Last reply by rwogh

more options

This is a RtlpWaitForCriticalSection crash and I read the article on dealing with it to discover the probable cause. However, I don't know what the file is and how it could interfere with my web browsing. Any help? I also noticed that I'm getting frequent crashes with other browsers as well (IE and Chrome, Safari seems to work fine). My most recent crash report is linked below:

Crash ID(s)


All Replies (1)

more options

I had this same problem and it was getting worse and worse until I couldn't open most sites.

I'm not sure exactly what fixed it, but I cleared ALL of Firefox's Cookies and Cache and also performed Disk Cleanup on all of my drives (Temporary Files, setup logs, etc.)

This did the trick and I'm back up and running without problems.