The portable version comes with its own profile folder and doesn't interfere with currently installed Firefox versions. *http://portableapps.com/apps/internet/firefox_portable *http://portableapps.com/apps/internet/firefox-portable-esr *http://sourceforge.net/projects/portableapps/files/Mozilla%20Firefox%2C%20Portable%20Ed./ *http://www.freesmug.org/portableapps:firefox#toc1 *http://portableapps.com/support/firefox_portable#helper_apps

Hello, also, see for more info the '''ultimate guide for that by the-edmeister''' : http://forums.mozillazine.org/viewtopic.php?f=23&t=2821799 thanks