I have restored everything in firefox on my new computer except my grouped tabs. I have read that a sessionrestore.js file can be replaced and that will contain my grouped tabs, but I don't know if it will replace everything else at the same time. I'm not even positive that is the file I should move over, or what the ramifications would be of doing that. I had an old xp computer that crashed, and I'm now on a windows 7 laptop. I have access (as an external hard drive) to my old files, which is how I have been able to replace my bookmarks, passwords, etc. However, I can't get back my grouped tabs, and I have hundreds of hours of research in those tabs! Any help you can give me would be much appreciated!!! Thanks, B :)