Calculate UAppData for Portable Install

Hi all (and John )

From addon scope, the special path UAppData does not update for FirefoxPortable, is there a way I can calculate this path in my addon.

Special path obtained by: Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties).get('KEYWORD_HERE', Ci.nsIFile).path;

UAppData is giving me: C:\Users\C71ZQW1\AppData\Roaming\Mozilla\Firefox
This path is valid IF and only if Firefox was HARD/FULL installed (as in not portable) to anywhere on the C drive.

But I have installed FireefoxPortable to: C:\Users\C71ZQW1\Desktop\FirefoxPortable

Can you please help me calculate the correct UAppData based on the results returned by other special paths.

For my portable app this is what all is returned by all the special path keywords:
https://gist.github.com/yajd/ed58adda53d5ef513c1f#comment-1224528

Thanks