Mozilla Firefox is definitely one of the most popular browsers in every corner of the world, as it provides excellent browsing speed and very powerful customization tools, with just a reasonable footprint on computer resources.

Firefox is now available on multiple platforms, including Mac OS X and Linux, as well as portable devices, so it has to be something really special about it since so many people are using it.

The first contact with Firefox shouldn't be surprising since most browsers have already adopted tabbed browsing. It comes with a tabbed interface so opening multiple pages at the same page isn't a problem anymore. But what's under the hood is what really makes the difference.

Firefox is amazingly fast and blocks pop-ups, viruses and spyware, but also gives the user an extraordinary power of customization through a well-developed add-on manager. Basically, you can change almost everything in your browser, starting with the way it looks and ending with features and functionality.

Mozilla lets you install new themes and so-called Personas that change the appearance of the main window, as well as plug-ins and extensions for adding new features to the application.

Last but not least, just like the latest iterations of Internet Explorer, it comes with integrated search engines, powered by Google or Yahoo. Plus, it features a powerful bookmark manager, an advanced pop-up blocker, efficient privacy controls and detailed settings menus.

Firefox is very light on computer resources and it performs without a glitch on older computers as well. This browser is fast, reliable and the crash rate is very low. In addition, with the aid of a few extensions and themes, Firefox can be personalized to your own taste.