JLS
It's been my experience when updating to a totally newer version, that If I uninstall using add/remove and then install the newly downloaded version, I keep all my bookmarks and extensions intact. So don't delete any of the files/folders you might find in c: programs, and you should be okay....
since your current version is as old as it is, that's how I would do it....but for future reference, you can update newer versions thru the 'check updates' under the Help menu.
btw the newest version is now 1.5.0.3
http://www.mozilla.com/
hth
