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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".
Content:
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]].
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]]
Other problems can be solved by [[Profiles|creating a new profile]].
If you find none of these things work and you still want to downgrade to a previous version, you can do so by downloading and running a previous version's installer.
= Installing Firefox 3.5.x =
The latest updates to Firefox 3.5 are made available [http://www.mozilla.com/en-US/firefox/all-older.html here].
= Previous versions =
;:{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:
{for win}[[Video:c67016b0ab2574b4ee6b0d18d2a4b268-1246329913-984-0]]{/for}
# 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 turn off [[Updating Firefox#Configuring update options|Software Update]]. It is highly recommended that you try new versions of Firefox as they're released to see if they solve your problem.
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 installing 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 find none of these things work and you still want to downgrade to a previous version, you can do so by downloading and running a previous version's installer.
{for fx4}{warning}'''Warning: If you made changes to some extensions or toolbars in your new version of Firefox, downgrading to a previous version may make trouble with your extensions and toolbar customizations.'''{/warning}{/for}
= Getting and installing the latest previous major version =
The latest updates of the previous major version are made available [http://www.mozilla.com/en-US/firefox/all-older.html here].
= Getting and 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.