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.

ابحث في الدعم

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

downgrade update

  • 2 (ردّان اثنان)
  • 1 has this problem
  • 1 view
  • آخر ردّ كتبه James

more options

i want to downgrade to firefox to verson 2.1.1

i want to downgrade to firefox to verson 2.1.1

All Replies (2)

more options

I've called the big guys to help you. Good luck.

Why do you want to downgrade? Is there a problem?

more options

There is no such Firefox browser version as 2.1.1

The only secure versions of Firefox currently are Firefox 40.0.3 and the 38.2.1 ESR.

Every earlier versions are potentially vulnerable due to have having the security fixes since. https://www.mozilla.org/security/known-vulnerabilities/

Since you are using Windows there is the option of using a old vulnerable version by way of portable Firefox for the one thing you need a older version for. The portable Firefox will not touch your Firefox 40.0.3 install and Profile used with it.