Bug 1953884 made the storeID pref always set and used the presence of storeID in profiles.ini to
determine whether profiles had previously been created. However it missed the startup code in
nsToolkitProfileService which always sets the storeID in profiles.ini if there is one set in prefs.
This means that users who had never used the profiles feature had the profiles created pref set to
true but no entry for the current profile was added to the database. This causes bustage when we
attempt to display various parts of the UI.
This adds a check to a point in startup when we know we should have found an entry for the current
profile in the database. If one doesn't exist we either create one if there are other profiles in
the database or we reset the prefs and profiles.ini to what they should look like if no profiles
have ever been created.
This should also resolve bug 1943559.
Differential Revision: https://phabricator.services.mozilla.com/D246775
e648a053c2