Firefox is a free and open source web browser developed by Mozilla Foundation and the community. Roughly 250 million people use Firefox to browse the web daily. The browser is loved by many and in the open-source world it's seen as the defacto web browser. Firefox is highly extensible, and provides an ecosystem for thousands of third-party add-ons, that can be used to extend the capability of the software. According to tests the Firefox outperform similar web browsers like Google Chrome and Safari. The Firefox project also takes deep pride in preserving user privacy in a world where more and more personal data is collected.