Features of Firefox

These are some of the features of Mozilla Firefox that distinguish it from other web browsers such as Internet Explorer.

Major differences

To avoid interface bloat and ship a relatively smaller core customizable to meet individual users' needs, and allow for corporate or institutional extensions to meet their varying policies, Firefox relies on a robust extension system to allow users to modify the browser according to their requirements instead of providing all features in the standard distribution.

While Opera (web browser) and Google Chrome do the same, extensions for these are fewer in number as of late 2013. Internet Explorer also has an extension system but less widely supported than that of others. Developers supporting multiple browsers almost always support Firefox, and in many instances exclusively. As Opera has a policy of deliberately including more features in the core as they prove useful, the market for extensions is relatively unstable but also there is less need for them. The sheer number of extensions is not a good guide to the capabilities of a browser.