July 16, 2009

The war of the Web browsers has taken another turn with the release of a major new version of Mozilla Firefox, the No. 2 browser in market share, but No. 1 in the hearts of many of the most knowledgeable computer users.

This new edition of Firefox is the third big new browser release this year, following new editions of Microsoft’s Internet Explorer and Apple’s Safari. Unlike Firefox, these two browsers come bundled with the two major computer platforms, Windows and Mac. By contrast, Mozilla must convince users to download Firefox, which comes in essentially identical versions for both systems. And it has done a reasonably good job, garnering by most estimates around 23% market share, versus between 60% and 70% for IE, which is by far the leader. Meanwhile, Google—a former Firefox supporter—has joined the battle with its nascent Chrome browser, which so far runs only on Windows, but is due on the Mac one day and is to morph into a whole new operating system next year. And there are other very capable browsers with small user bases, the most notable of which is Opera.

I’ve been using Firefox since its inception years ago, and have been testing this latest iteration, version 3.5, since it emerged June 30. I can continue to recommend it as a fine way to surf the Web. The new version is improved, and worked very well for me on both my Windows and Macintosh computers.

But, in this round of the war, Mozilla’s product no longer stands out as clearly superior, for two reasons. First, Firefox has lost its traditionally biggest advantage: greater speed than its rivals. While Firefox 3.5 is about twice as fast as the previous version 3.0, and handily beat Internet Explorer 8 in my tests, it lagged behind both Safari 4.02 and the beta edition of Chrome 2.0 a bit in most test scenarios. Overall, Safari was fastest in most of my tests, both on Mac and Windows.