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

Where can I go to download Firefox 50.0

  • 2 svar
  • 3 har dette problemet
  • 46 views
  • Siste svar av goatgod

more options

Firefox 51.0 has a known bug with Norton Security Suite on XP sp3. When Firefox opens, a Norton program, conathst.exe continually opens and runs, until there are hundreds of copies of this executible file running, until the computer crashes and automatically restarts. Other forums have said that it is fixed when you revert to Firefox 50.0

Where can I download Firefox 50.0?

Firefox 51.0 has a known bug with Norton Security Suite on XP sp3. When Firefox opens, a Norton program, conathst.exe continually opens and runs, until there are hundreds of copies of this executible file running, until the computer crashes and automatically restarts. Other forums have said that it is fixed when you revert to Firefox 50.0 Where can I download Firefox 50.0?

All Replies (2)

more options

Valgt løsning

more options

Thank you, Ed-Meister :>)

Going back to Firefox 50.0 does solve the problem of Norton 360 repeatedly launching conathst.exe until all the memory is used up and the pc restarts.

Thanks for pointing me to this safe download site for the previous versions: https://support.mozilla.org/en-US/kb/install-older-version-of-firefox