Is there a way to shut down TBP neatly using a command line?
The purpose of this is to be able to shut it down from a batch file.
Thanks
New: HandBrake (Feb 20, 2026), Platform 30.2 (Feb 17, 2026)
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Found an extension (Mail Tweak) that adds shutdown support:
ThunderbirdPortable.exe -quit
It works great. Just that it's a large extension just for a shutdown feature.