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Firefox for Mac

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Download Firefox 66.0.1

Firefox 66.0.1

  -  64.8 MB  -  Freeware
  • Latest Version:

    Firefox 120.0.1

  • Requirements:

    Mac OS X 10.9 or later

  • User Rating:

    Click to vote
  • Author / Product:

    Mozilla Organization / External Link

  • Old Versions:

  • Filename:

    Firefox 66.0.1.dmg

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system. Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Firefox 66.0.1.


For those interested in downloading the most recent release of Firefox for Mac or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

  • Firefox 66.0.1 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

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