Some how I seem to have lost my original profile within Firefox! (Not that I ever created a specific one but was just using the default).
I just launched firefox and a window popped up saying the profile was in use (it wasn't!) and invited me to create a new one. I wasn't paying much attention so I did and now the new one is the default and I can't see how to get the old one back!
The problem is of course that all my bookmarks are under the old profile and I want them back!