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Mozilla Firefox (en-US): official download

Official file from the developer. Press the button to start.

Mozilla Firefox (en-US)

90.2 MB Version 159.0 updated Oct 27, 2026

Download 159.0

Back to Mozilla Firefox (en-US)

How to install Mozilla Firefox (en-US)

  1. Press the download button to get the official file.
  2. Run the installer you saved and confirm the Windows security prompt if the publisher matches.
  3. Follow the setup steps, then start Mozilla Firefox (en-US) from the Start menu.

File safety

The file comes straight from the developer's server. We never store or change it.

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