In a nutshell;
using FF or TB portable on a machine with FF or TB installed mess up with my profile... again...
and I'm slowly doubting the name "portable" if two far far away path are messing up eachother (or more my portable profile)
C:\Users\XYZ\Appdata\Roaming\Firefox\... VS P:\PortableApps\FirefoxPortable\Data\profile
So... now what? Definitely making backups every time after closing, because,
1. WHO do that?
and 2. This will take a long time...
(3. Shouldn't that happen after all?)
Now, some Info:
PortableApps is installed on an exFAT Partition next to a NTFS Partition on an external HDD