Install an older version of Firefox

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This article describes how to install a previous version of Firefox, a process also known as "downgrading". For instructions on how to install a newer version, see Update Firefox to the latest release.

Installing a previous version doesn't fix most problems

Problems after upgrading Firefox are generally not caused by the new version itself, but rather the upgrade process. Installing a previous version will not help for most problems. To get help, see:

Other problems can be solved by creating a new profile.

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

If you still want to downgrade to a previous version, you can do so by downloading and running it's installer from this page.

Warning: The previous version will only be maintained with security and stability updates for a short amount of time.