Install an older version of Firefox

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  • Revision id: 32538
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  • Creator: scoobidiver
  • Comment: 15.0.1 instead of 15.0, no en-US, 15 as keyword
  • Reviewed: Yes
  • Reviewed:
  • Reviewed by: Verdi
  • Is approved? Yes
  • Is current revision? No
  • Ready for localization: Yes
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  • Readied for localization by: Verdi
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Often when there is a problem with a Firefox update, people look for a way to go back to the previous version. That usually doesn't solve the problem and will make your computer and information vulnerable to attack. This article gives you some alternatives to downgrading and links to old versions of Firefox if you do choose to downgrade.

Installing a previous version doesn't fix most problems

Problems with an update are generally not caused by the new version of Firefox, but rather the update process. Installing a previous version will not help in most cases. Instead, see:

Other problems can be solved by creating a new profile or by following the steps in the Troubleshoot and diagnose Firefox problems article.

Other problems can be solved with the Reset Firefox feature. It restores Firefox to its factory default state while saving your essential information.

I still want to downgrade — where can I get the previous version?

Although Mozilla has a website with old versions of Firefox for testing purposes, it is not recommended that you use anything but the latest version.
Warning: Using old versions of Firefox poses a significant security risk.

If you can't use the latest version of Firefox, we recommend that you use the latest version of another browser:

Help us make Firefox better

If the latest version of Firefox is causing problems for you or you just don't like something about it, please give us feedback about it here: