permissions.sqlite for Permissions and possibly content-prefs.sqlite for other website specific data (Site Preferences).persdict.dat for words you added to the spelling checker dictionary.If you only have cert8.db then make sure to remove an existing cert9.db cert9.db (58+) or cert8.db (57 and older) for (intermediate) certificates stored in the Certificate Manager.If you only have ke圓.db then make sure to remove an existing key4.db
#OLDER FIREFOX PASSWORD#
The Firefox profile folder is in a hidden location in AppData\Roaming, so make sure you can see hidden files and folders. If you have already manually created separate profiles for different installations, you will not notice the change (this has been the recommended procedure on Nightly for a while).If you still have the old drive hooked up then you should be able to access your previously used profile folder on that drive. I already use separate profiles for my different Firefox installations Note: Downgrade protection can be overridden by launching Firefox through the command line with the -allow-downgrade parameter. When you downgrade Firefox and use a new profile, any profile that was used in the higher version is still available in the Profile Manager, for use in a more recent version of Firefox. If you try to launch a Firefox installation with a profile that was last used in a more recent version, you'll see a warning that using an older version of Firefox can corrupt profile data such as bookmarks and browsing history:Ĭlick the Create New Profile button to start Firefox with a new profile. Any previous profile data is saved and associated with the first Firefox installation opened after the change. Starting with Firefox version 67, each Firefox installation requires a separate profile. You’ll have to create a new profile to avoid corruption issues. What happens to my profile if I downgrade to a previous version of Firefox? Once you sign in to your Firefox Account on Firefox, any data saved to Sync from other installation of Firefox should appear. I am a Sync user, will my saved data still remain synced?
#OLDER FIREFOX UPDATE#
Directions are available in the Profile Manager article and in the Recover user data missing after Firefox update article. You can use the Profile Manager for each installation, to set a new default profile. Get started with Sync here.Ĭan I change which Firefox installation uses a previous profile? You also get additional benefits like sending tabs and secure password storage. Sync is the easiest way to make your profiles consistent on all of your installations of Firefox. If you would like the information you save to Firefox to be the same on all installations, you can use a Firefox Account to keep them in sync. Your profile data will be different for each installation of Firefox.
You will not lose the personal data or customizations you had before, since your old profile data is saved and associated with the previous Firefox installation.
#OLDER FIREFOX INSTALL#
If you install a new, additional installation of Firefox, a new profile will be created. This makes Firefox more stable when switching between installations on the same computer and also allows you to run different Firefox installations at the same time. Firefox uses a dedicated profile for each installation of Firefox, including Nightly, Beta, Developer Edition, and Extended Support Release (ESR) installations. Some users have multiple installations of Firefox, each in separate application program folders. What happens if I have more than one installation of Firefox? This profile is stored in a location separate from the Firefox application program files.
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