I wonder if it is really safe to put all your credentials/accounts username and password on an external server. Compromising the server will bring disasters.My little review on lastpass is it's probably the best firefox/ie addon ever been made, lastpass basically stores all your logins online in one place instead of your PC, that way you are fully protected from pass stealers and having your passwords compromised, with lastpass you can login from any other pc with the addon on and you won't have to type any password again, all you need is to enter One master-pass and it will give you access to all of your other passwords instantly.
Product review on firefox page:
LastPass is a free online password manager and Form Filler that makes your web browsing easier and more secure. LastPass supports IE and Firefox as Plugins (Opera, Safari, Chrome, iPhone, Opera Mini via Bookmarklets), allows you to import from every major password storage vendor and export too, captures passwords that other managers won't including many AJAX forms, and allows you to make strong passwords easily. Your sensitive data is encrypted _locally_ before upload so even LastPass cannot get access to it. One Time Passwords & Screen Keyboard help protect your master password.
You can download it from Here