Mozilla Firefox is a popular web browser known for its speed, privacy features, and customization options. Here's a list of some of its key features:

Cross-Platform: Available for Windows, macOS, Linux, and mobile devices running Android and iOS.

Speed: Firefox is known for its fast browsing speeds, especially when loading web pages and running web applications.

Privacy Protection: Includes features like Enhanced Tracking Protection, which blocks trackers and third-party cookies, as well as a built-in password manager and private browsing mode.

Customization: Firefox offers a range of customization options, including themes, extensions, and the ability to customize the toolbar.