My apologies for the messed up text layout in my above question.

The 2 situation A and B A: Multiple profiles setup through ProfileManager, I assume firefox portable updates these profiles correctly B: Multiple profiles setup through creating a folder within "\Data" and then start different .ini corresponding to the profile in the "\Data" folder.

B: where I added a folder within "\Data" for example "\Data\ron_development" and then start with a different ini. I would use a script that changes the line in "FirefoxPortable.ini" (ProfileDirectory=ron_development).

=> But when I update firefox portable, does firefox portable "know" there is a profile called "ron_development" and does it update correctly?

A profile normally gets updated if you start Firefox with this profile. The updater touch a profile directly, only running Firefox with a profile does. So you would have to start Firefox with each of the profiles to ensure that all profiles are updated.