This disables automatic updates for the selected add-on. Locate Automatic Updates there and switch it from Default to Off. Open about:add-ons in the Firefox address bar and click on the more link next to the extension that you have just downgraded. If you would stop right here Firefox will pick up the new version of the add-on and try to install that version automatically. It is however usually a lot easier to use the official Mozilla Firefox site for that. Developers sometimes offer download links to old add-on versions on their websites. If you do know the ID, you can download it from the ftp server as well.Ī third alternative comes, sometimes, in the form of developer homepages on the Internet (not on Mozilla). You do however need the unique add-on ID which is not displayed publicly anymore (Mozilla switched from displaying the unique ID in the url to descriptive names instead). You can alternatively connect to the public Mozilla ftp server to download a previous add-on version. Update: The FTP alternative is no longer available. Mozilla removed the add-ons directory from the FTP server. The add-ons manager should now display the installed version and not the latest one. If the add-on is compatible, you can install the extension from Mozilla's site directly and restart the browser afterward to complete the process. Release notes are usually offered for every version listed on the version history page but these are managed by the extension developer some offer detailed information while others may not provide information at all. While it is possible to download these add-on versions, it may not be possible to install them in the Firefox web browser. Note that older versions of add-ons may not be compatible with the version of Firefox.
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