On startup Thunderbird quickly flashes up a small window with "<window id=messengerWin" and then quits
When I try to open Thunderbird a small window quickly flashes up with "<window id=messengerWin" and then quits. </p>
I can start Thunderbird in safe mode with my old profile no problems.
I've just moved my profile from a OSX El Capitan system to a new OSX Catalina machine.
Solution choisie
After using Thunderbird in Safe Mode the last few weeks, today it just downloaded an update and fixed itself. Hooray!
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Solution choisie
After using Thunderbird in Safe Mode the last few weeks, today it just downloaded an update and fixed itself. Hooray!