The shutdown process was made more robust. So you can expect a somewhat longer shutdown time. There should be no need to shut down Thunderbird more than once a week.

On your accounts, do you have expunge or delete trash on shutdown enabled?

Hi, thank you for the reply !

I did some exact timing

Exit Program 60.9.1 till all (1) Thunderbird processes terminated in System Explorer : 10 seconds Exit Program 102.13.1 till all (4) Thunderbird processes terminated in System Explorer : 2 minutes 40 seconds = 160 seconds

That's a lot more than "somewhat longer"

I know it's not "needed" to shut down Thunderbird more than once a week, but there are other reasons (like switching to another profile) to do that, which has become very annoying in 102.13.1

I don't see any "expunge or delete trash" setting, not in 60.9.1 and not in 102.13.1

Thanks for the timings

When I look at System Explorer, after clicking Exit, not much seems to happen during those 1-2 minutes (till all processes are suddenly terminated). I also noticed that Thunderbird 60.9.1 did have 1 active process, Thunderbird 102.13.1 does have 4.

The number of processes is normal.

Do you have newsgroups? Large ones? If so, perhaps https://bugzilla.mozilla.org/show_bug.cgi?id=887610

Does it happen if Windows has been started in safe mode? https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode

Is it always 1-2 minutes? And how much memory is Thunderbird using before shutdown according to taskmgr?

With taskmgr at 460MB it took again 2 minutes 40 seconds And yes, it is always something like that.

I do not have newsgroups, all IMAP (and some POP)

I don't see what Windows Safe mode can solve, as with an identical profile everything is fine in 60.9.1