Tabs in SeaMonkey can now be reopened after they have been closed and the way passwords and usernames are handled has been overhauled. SeaMonkey 2.0 has been refurbished with a modern version of Firefox based on Firefox 3.5.4 and is now much closer to Firefox as far as user profiles, add-ons, and functionality of user interface elements are concerned. The similarities of SeaMonkey with Firefox are obvious from the start - and with good reason.