Mozilla Firefox, usually shortened to Firefox, is the name of the Web browser that the Mozilla Foundation makes. It's an open source tool that's available for Windows, Mac and Linux users, and is also the default search engine on Yahoo.
People can get a free download of the software from the company's website.
Mobile users can use Firefox on their Android devices, such as smartphones and tablets. However, as of December, 2014, it's not available for the Apple iPad, iPhone or iPod touch.
Firefox Hello is a feature that lets users make free calls from their browser. This functionality offers both voice and video chat, and is available from any platform that can run the Firefox browser.