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

I installed quantum, but after I closed it, Firefox launches my old version. Can't find quantum anywhere

  • 1 reply
  • 2 have this problem
  • 1 view
  • Last reply by Scribe

more options

Just installed Quantum. After I closed the browser, though, Firefox launches my old version.

There's only 1 version of firefox on my system and it's still the old version.

Just installed Quantum. After I closed the browser, though, Firefox launches my old version. There's only 1 version of firefox on my system and it's still the old version.

All Replies (1)

more options

Hi, yes you appear to be on v52. Please try closing Firefox, then download using another browser from https://www.mozilla.org/en-US/firefox/all/

All your data should be kept.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you!