Help > Troubleshooting Information > Profile Directory: Open Containing Folder

Copy and Paste this code in the Code field in the "Tools > Error Console" and click the Evaluate button to see the location of the profile folder.

alert(Components.classes["@mozilla.org/file/directory_service;1"].getService(Components.interfaces.nsIProperties).get("ProfD", Components.interfaces.nsIFile).path);

• Nightly Tester Tools: https://addons.mozilla.org/firefox/addon/nightly-tester-tools/

Incredibly quick reply and right on the money. Thanks!

I don't suppose that you know how one changes which profile FF5 uses? ...

You're welcome

in address bar type: about:cache and look at Offline cache device -> Cache Directory

Thank you!