When you install Firefox 3, you don't have to worry about losing anything from Firefox 2—history, bookmarks, start page, search engine preference, and even downloads performed in the earlier browser version—all will be there to greet you like old friends. The installer for Firefox 3 is available in 46 languages, from Afrikaans to Ukrainian. The US English version weighs in at a 7.1MB for Windows, 17 for Mac OS X, and 8.6 for Linux. Installation is as painless as it gets—it took me about 20 seconds on a far-from-new XP system.
Firefox 3 looks barely different than its predecessor, but it's undergone a minor face-lift—in particular, the Forward and Back buttons, in combination, look like a sideways keyhole. The browser buttons and window frames have also been redesigned to conform with the look of whichever OS you're running—Windows XP, Vista, Macintosh, or Linux.