Is Mozilla Firefox a free web browser?

Yes, **Mozilla Firefox** is a free and open-source web browser, meaning it can be downloaded and used without any cost. Its open-source nature also allows for community contributions and transparency.

What operating systems does Mozilla Firefox support?

**Mozilla Firefox** is a cross-platform browser that supports a wide range of operating systems, including Windows, macOS, and Linux, providing a consistent browsing experience across different devices.

Can I customize Mozilla Firefox?

Yes, **Mozilla Firefox** is highly customizable. Users can personalize their browsing experience by adding extensions and themes from the official add-ons site, allowing them to expand functionality and change the browser's appearance to suit their preferences.