hi czwarts01, firefox 67 introduced a feature called "dedicated profiles". this allows users to install multiple firefox versions (like release and nightly versions) side-by site - each of them will be using its own profile, since sharing the same profile across multiple versions is not supported (profiles are not downwards compatible).

this is done by looking at the install path - as long as your firefox installation folder isn't changing, there actually shouldn't be any new profiles created though...

Dedicated profiles per Firefox installation

I wish that when a new release of Firefox is installed, the same default profile in use with the release I am currently running is selected as the default profile when the new release of Firefox is first started. I cannot get Sync... to restore my Default profile from the previous active release.

This is truly annoying because Mozilla issues as many as two updates a week. Please stop installing a "new" profile that has useless settings and information in it and automatically use the default profile that was being used by the previous release of Firefox.

Doing this will let me get all the bookmarks, passwords, etc. that I have built up over the years in the new release. I don't mind signing in to Firefox Accounts to reestablish the sync but I do resent having to go to about:profiles and find my old default profile and set it to the default in the new release.

See also:

• https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile