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downgrade

This article describes how to install a previous version of Firefox, a process also known as "downgrading".

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 [[Updating Firefox]]. __TOC__ = Why install a previous version?= 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. Some common issues include: * [[Cannot connect after upgrading Firefox|Can't access websites anymore]] * [[Firefox cannot connect securely because the SSL protocol is disabled|"Firefox can't connect securely..." error]] * [[Add-ons are disabled after updating Firefox]] Other problems can be solved by [[Managing profiles#w_creating-a-profile|creating a new profile]]. If you still want to downgrade to a previous version, you can do so by downloading and running a previous version's installer. = Installing the previous major version = The latest update to the previous major version of Firefox is available [http://www.mozilla.com/en-US/firefox/all-older.html here]. = Installing any previous version = {note}'''Previous versions of Firefox have public security problems. You could be exposed to viruses, phishing, and other attacks by running old versions.'''{/note} To find a previous version: # Go to the [ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/ Mozilla FTP server]. # Choose the version you want. # Choose the {for win}'''win32/'''{/for}{for mac}'''mac/'''{/for}{for linux}'''linux-1686/'''{/for} folder # Choose your language. '''en-US''' is US English. # Choose the file that does ''not'' end in {filepath .asc}. The download will then start. # Once the file is downloaded, [[Installing Firefox|install it]]. After downgrading, if you intend to stay with that version, you will need to disable [[Updating Firefox#w_configuring-update-options|automatic updating]]. It is highly recommended that you try new versions of Firefox as they're released to see if they solve your problem.