firefox is working fine on vista for me - plugins, extensions, and everything else..
have you tried manually downloading/installing flash, etc? sometimes firefox is not so good at doing the \'automatic\' installations of those things.. try the manual flash install here:
http://www.adobe.com/products/flashplayer/when you say you didn\'t back anything up, what exactly do you mean? did you wipe out your hard drive and start from scratch, or did you just do an upgrade to vista?
if you didn\'t wipe everything, look for a file called
iTunes Library.itl. that\'s your itunes database. you\'ll need to take the old one and copy it over the new one. as long as your physical music files are still in place, it should load fine...
hope that helps.. let me know if it doesn\'t make sense.. been a long day and it\'s quite possible i\'m not making any sense whatsoever right now..