Mozilla Firefox

Firefox 12 is a worthy expression of Mozilla's ideals. The browser is competitively fast, sports a new minimalist look, and includes some excellently executed features. Unfortunately, that describes most of Firefox's competition, too.

For those of you who spent last year away from the Internet, it's the year that Firefox went from annual major-point updates to a Chrome-style quick-release cycle. How quick? A new major version number along with a spate of performance and feature improvements lands in the Firefox stable version every six weeks. So, Firefox is on version 12 at the time of this review. As a point of comparison, Chrome is currently on version 18 even though it only launched in 2008.

To put it bluntly: Firefox has benefited from the rapid-release cycle. Both fixes and features get out to users faster than before, which puts a safer, sleeker browser in your hands with fewer delays. A vocal, minuscule minority has pooh-poohed the increase in version numbers, but that's hardly a legitimate complaint in a world where mobile apps update silently and effectively.

These major changes first landed in Firefox 4, released in March 2011, so we're going to be referencing it a fair bit. The browser that you can download now is in the same speed category as its competition; offers many similar features (stronger in some areas and slightly weaker in others); includes broad, cross-platform support for hardware acceleration and other "future-Web" tech and standards; and is a must-have for Android users (download for Android)
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Firefox 12 continues to build on the Web site developer tool improvements that first landed in Firefox 10 and Firefox 11. Version 12 makes more than 85 changes, big and small, to the features that help developers construct the sites that you use. But those weren't the only changes. Where Firefox 10 began marking most add-ons as compatible by default, and Firefox 11 begat add-on synchronization, Firefox 12 makes one small but noticeable change to the Windows version. Firefox on Windows will no longer ask you to interact with the User Account Control after you give it initial approval. This means that from Firefox 13 and on, if you use Windows, you won't see a UAC query before updating.

It's important to point out that there are four versions of Firefox available at the moment, and this review only addresses the stable branch, intended for general use. Firefox's other channels -- Firefox beta (download for Windows | Mac | Linux); Firefox Aurora, analogous to Google Chrome's dev channel (download Aurora for Windows | Mac | Linux); and the bleeding-edge, updated-nightly Firefox Minefield (download for all versions) -- are respectively progressively less stable versions of the browser, and aimed at developers.

Another big new feature in 2011 has been support for restartless add-ons. These add-ons are written differently from standard Firefox add-ons, and are expected to become the format for add-ons in the future. As such, relatively speaking, not many restartless add-ons exist -- fewer than 1,000, compared with the thousands of "standard" add-ons. However, this is an improvement of more than 600 add-ons since Firefox 4 debuted in March 2011.

As mentioned earlier, Firefox 12's performance has been greatly improved by the addition of graphics processing unit (GPU) hardware acceleration. It allows the browser to shove certain rendering tasks onto the computer's graphics card, freeing up CPU resources while making page rendering and animations load faster. These tasks include composition support, rendering support, and desktop compositing.

Firefox 12 faces a challenging and ever-advancing field of competition. Some people have probably abandoned Firefox because of the significant speed differences between version 3.6 and Google Chrome. Others might be turned off by Mozilla's open-armed embrace of the rapid-release cycle, and the diminishing importance of version numbers. Frankly, we find that a bit silly, as it's better to get newer features and fixes as soon as they're ready, instead of waiting for a once-yearly update. Competition has forced Mozilla and others to put out better browsers in order to thrive, and we think that Firefox 12 will keep the browser competitive.

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