Firefox logo
  • Price: Free
  • Website: www.mozilla.com/firefox
  • Version we tested: 3.5.5
  • Good points: Excellent ease of use score. Small footprint for memory usage. Largest range of third-party add-ons. Supports themes/skins.
  • But: Doesn’t support ad filtering by default. No mobile version.

Mozilla’s Firefox ranks a distant second behind Internet Explorer for market share, but can be customised thanks to third-party support for its extendable architecture. This helps keep Firefox relatively lean but allows individual users to add specific features that they like.

Mozilla claims more than 6000 free add-ons are available. Popular Firefox extensions include ad blockers, appearance enhancers, toolbars, video downloaders, social networking tools and security enhancers.

You can search for Firefox add-ons using the menu on the Firefox home page or via Add-ons in the Tools menu.

Many Firefox extensions also work in the SeaMonkey and Flock web browsers, which are also developed by Mozilla.  Firefox 3.5 also includes a private browsing mode.

See the test results for more details of Firefox's performance and features.

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