Where is the Application Data

XP keeps its Application Data in C:\Documents and Settings\(user name) but not 7. My previous question to this forum was in respect of the Firefox profile which are stored in Application Data. Maybe the first question was too specific - hence this one.
What I need to find is where the specific profiles and the profile.ini files are kept . Any help would be gratefully received.
Is there any mileage in trying to ask Microsoft using the feedback route or other way?

I think the folder you are looking for is C:\Users\Username\AppData\Local You can then browse for the FF profile in that directory, or perhaps one of the ones along side it (C:\Users\Username\AppData\Roaming).