I simply do this: A) Navigate to C:\Documents and Settings\<user>\Application Data\Mozilla\Firefox B) Copy the two files and folder, and place them elsewhere. C) When you next re-install Firefox, simply copy the two files and the folder back into C:\Documents and Settings\<user>\Application Data\Mozilla\Firefox. Voila, all your themes, extensions, and custom settings. Even your bookmark. Typically I start out with a clean install of Firefox first, and make changes I need, then do the backup. This method in itself won't install plugins, so you'd need to run those installations seperately. However, it's as easy as writing a batch script to automate the process of copying the files/folders over. I understand the advantages of a simple install package doing it all for you, but I like my method