Even though Firefox 3 is fantastic in its own right, tossing a few add-ons in the mix makes it that much more fabulous. In fact, so many people use add-ons, Firefox now features a way to get new ones right from the Add-ons Manager. Now that the dust has settled following Firefox's latest release, many of the most beloved add-ons have been tweaked to work with it. Everyone has their favorites, but let's take a look at a few of the most popular.