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Download Firefox

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Firefox Privacy Notice

Your talents are needed for a better internet

Mozilla is a non-profit organization working to ensure the internet is open and welcoming to all. And we need your help. By joining our community, you can help drive innovation, enhance accountability and trust and make the internet a better place for everyone.

How you can contribute…

Our Mission

Our mission is to ensure the internet is a global public resource, open and accessible to all. An internet that truly puts people first, where individuals can shape their own experience and are empowered, safe and independent.

Made by passionate people like you

When you contribute to Mozilla, you become part of a worldwide community made up of people from around the globe who believe that we all have a role in ensuring that the internet remains a force for good.

We believe community collaboration is vital to creating an internet that is diverse, innovative, and accountable to the people who need it most. Whether you have a background in tech, community organizing, or just a computer and some free time, you can help us make the internet a better place.

Get Help

Mozilla has a dedicated team of volunteers to help with whatever issues you may be experiencing.

Problems with a web page?

If your experience of a website differs between browsers then you may have discovered a web compatibility issue. We would love to know about it!