Go to your old computer. Plug in a thumb drive. Open a file browser / explorer. Go to the Firefox profiles folder in your user folder. Example; Win 7: C:\Users\==<user>==\AppData\Roaming\Mozilla\Firefox\Profiles Open another window to the thumb drive. Create a folder named what ever you want. Then open that folder. Return to the old profile folder. Mark everything in the folder you want on the new system. Now, drag the marked into the thumb drive folder you created. Once the coping is done, Tell the computer to release the thumb. Plug the thumb into the new computer. Using its browser, '''[http://www.mozilla.org/en-US/firefox/all/ Download Firefox Full Installer For All languages And Systems]''' {web link} Run the installer. After Firefox is done installing, close it. Open the file browser to the thumb drive, and another to the profiles folder (as above). Mark what you want from the thumb, and drag them to the profiles folder, and drop it in. Everything you had on the old system is now on the new. Open the Firefox Profiles Manager. Choose the profile that you want to use. And you should be done. -------------- http://kb.mozillazine.org/Profile_folder_-_Firefox - Navigating_to_the_profile_folder ----------------------- '''https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles''' '''Windows: 32-bit''' C:\Program Files\Mozilla Firefox\firefox.exe -p '''64-bit''' C:\Program Files (x86)\Mozilla Firefox\firefox.exe -p '''Mac:''' Navigate to '''/Applications/Utilities.''' Open the Terminal application. In the Terminal application, enter the following: /Applications/Firefox.app/Contents/MacOS/firefox-bin -p '''Linux:''' In '''Terminal''' run: firefox –P For users who have one or more builds from mozilla.org this will not work. It would be best to have the full path so if you had placed the untared contents in a folder in /home it would be /home/<username>/foldername/firefox/firefox –P An easy way would be not to do it in a terminal but in say a launcher since you have to point it to the firefox script in Firefox folder you can then add –P on end. You can also have the exact "profilename" after the -P so Firefox will start with that Profile. ---------------------------- '''https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile''' '''https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles'''