Why is ThunderbirdPortable using non-portable locations?
I have standard Thunderbird installed in the standard location on my C: drive.
I just created a fresh install of Thunderbird Portable on a thumb drive using the PortableApps app.
Before creating ANY account or profile information, I navigate to /// -> Help -> Troubleshooting Information.
I see that the Update Folder parameter is pointing to a directory in C:\ProgramData\Mozilla\updates; this is NOT portable.