On Sun, Feb 15, 2026 at 12:43 AM Shawn K. Quinn <[email protected]> wrote: > The only really unusual thing about it is that it began as an Ubuntu install > and was cross-upgraded a couple of years ago. I doubt this is related to that > based on the other messages I have since received on this bug, however.
Actually, what you did is very unusual. Crossgrading from Ubuntu to Debian is not supported. Ubuntu's thunderbird packaging was managed completely separately from Debian's and I believe it didn't provide an apparmor profile. Your situation may not have been handled by Debian's postinst script. Thank you, Jeremy Bícha
