According to the official Mozilla blog, users currently at Firefox version 126.96.36.199 will get an upgrade notification to version 3, which came out last spring. I know most people who don’t follow tech news probably had no idea this was even out (like my parents), nor would they know how to upgrade. The Firefox folks to the rescue! Now when presented with the option to upgrade, it will be just matter of a few mouse clicks and you’ll be off to the races as the blog post explains. Lets hear it for making it simple!
Definitely do plan on upgrading to 3. Its worlds better than 2.0 ever was and most plugins (if you have any installed) are Firefox 3.0 compatible. If not, the install process will tell you which is really handy. So if you have not made the leap I strongly suggest you do so.