Firefox (referred to as Fx) is a web browser descended from the Mozilla Application Suite, managed by the Mozilla Corporation. Firefox is a highly customizable browser that allows you to enhance it using Add-ons. Some examples of Add-ons that you can use to customize Firefox are AdBlock Plus, DownThemAll!, TabMixPlus and many more. Tabbed browsing is one of the many features that helps to make Firefox an enjoyable browser. Firefox does not use ActiveX which helps make it a more secure browser. Firefox does make use of many plugins to enhance your web experience. From Shockwave, Flash, Quicktime and more; your browsing experience reaches new levels with the Firefox browser.