[Bug 1770587]

[Acdp]

Not sure I can add here as on 10.15.7 macOS

However, there is some familiarity on this issue. I seem to recall
having similer situ a few versions of TB back AND macOS, maybe that
version. At the time I think i srted by setting the profile window at
startup to appear and so I could then choose an existing profile already
set - think I also copied one profile to another directory (folder) and
renamed it and chose that from the Profile window

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https://bugs.launchpad.net/bugs/1770587

Title:
  creation of new email account impossible in thunderbird

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