[Baron Munchausen]

The latest Firefox is the 1.0 'Preview Release' which is what they used to call a 'release candidate' -- i.e. a final beta which might be confirmed as 1.0 if no serious bugs turn up. If there are problems they fix them and release another 'almost final' Version.

It's a good idea to go with the very latest because a lot of security fixes have been made to both Firefox and the Mozilla suite lately. Just got Mozilla 1.7.3 Last week which fixes several security holes. As more people use Mozilla/Firefox these security fixes will be more important because more hackers will be targetting these browsers.