Do a custom install and install each version in its own program folder to use multiple Firefox versions. * [[Custom installation of Firefox on Windows]] Create a new profile exclusively for each Firefox version and create a desktop shortcut with -P "profile" appended to the target to launch each Firefox version with its own profile. See these mozillaZine KB articles for information: * http://kb.mozillazine.org/Testing_pre-release_versions * http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows * http://kb.mozillazine.org/Shortcut_to_a_specific_profile * http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox

I'm working my way through this information. I'll let you know how it goes after I give it a try. Thanks,