I've been scouring the net for about 2 days now and have not found a solution for this. I'm setting up a Win 7 machine for public use and have included Firefox as one of the available browsers. Through GPO I have hidden the "C" drive from explorer/my computer/IE. However Firefox will still list files and directories using file:///c:/. I've found plenty of solutions for older versions of Firefox but nothing that works on newer versions. Perhaps someone a little wiser than me might be able to point me in the right direction?