All of your personal information for Firefox (bookmarks, passwords, etc.) are stored on your hard drive. You need to make a backup of your entire Profile folder '''''or''''' of certain items in your Profile folder '''''before''''' installing Windows 7. #Put the backup(s) in a safe place on another hard drive, on a CD, or on a USB/pin/thumb/jump drive until '''''after''''' Windows 7 is installed and Firefox is re-installed. #Then you can copy selected files into your new Profile folder under your Windows 7 installation of Firefox. Some information is duplicated in the following articles, but try to read all of them. If you thoroughly plan, you should lose none of your information. *See --> [http://support.mozilla.com/en-US/kb/Profiles#How_to_find_your_profile Profiles-How to find your Profile] *You may need this: http://kb.mozillazine.org/Show_hidden_files_and_folders *See --> [http://support.mozilla.com/en-US/kb/Backing+up+your+information Backing up your information] *See --> [http://kb.mozillazine.org/Profile_backup Profile backup] *See --> [http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox Transferring data to a new profile] (this article has a list of suggested items to transfer to your new Profile) *See --> [http://kb.mozillazine.org/Profile_folder_-_Firefox Profile folder -Firefox] (this article has a comprehensive list of files and folders in your Profile) *See --> [http://support.mozilla.com/en-US/kb/Recovering+important+data+from+an+old+profile Recovering important data from an old profile] Keep in mind that you will need to re-install, on your new Windows 7 installation, all of the Extensions (including toolbars that you may have installed), Plugins and Themes that you have installed in Firefox. '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''