One of the World's Most Popular Web Browsers for Mac

Firefox for Mac

Browse by Company

Adobe, Apowersoft, Autodesk, Avast, Corel, Cyberlink, Google, iMyFone, iTop, Movavi, PassFab, Passper, Tenorshare, Wargaming, Wondershare

Firefox 39.0.3

  -  73.1 MB  -  Freeware
Free Download

Security Status

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 39.0.3.


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.


We would love to hear from you

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!

Download Firefox 39.0.3

  • Firefox 39.0.3 Screenshots

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

    Firefox 39.0.3 Screenshot 1
  • Firefox 39.0.3 Screenshot 2
  • Firefox 39.0.3 Screenshot 3
  • Firefox 39.0.3 Screenshot 4
  • Firefox 39.0.3 Screenshot 5

What's new in this version:

Various security fixes:
- Same origin violation and local file stealing via PDF reader - a way to violate the same origin policy and inject script into a non-privileged part of the built-in PDF Viewer. This would allow an attacker to read and steal sensitive local files on the victim's computer.

Top Downloads

More Popular Software »