I copied ThunderbirdPortable.ini from other/source to the folder containing ThunderbirdPortable.exe. I added -safe-mode to the AdditionalParameters= line. I verified no thunderbird files were running in the background. Heck, I even shut down Firefox in case there were shared files. I start ThunderbirdPortable.exe and all my extensions are still running.
I deleted everything else from the .ini file so that it read only
and again ran the program. Still all the extensions are running.
WinXP. TBD3 installed in C:\PortableApps2\ThunderbirdPortable
Don't delete all those other INI entries. That's bad.
Okay, I just ran ThunderbirdPortable under the -safe-mode parameter in the INI file. You're right, it doesn't exactly work.
I'll check the launcher source and report back.
Edit: I don't think Thunderbird acts like Firefox in safe mode, it doesn't pop-up anything special. So maybe we're launching it in safe mode without knowing it?