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

Firefox for Mac

Firefox 91.0

  -  127 MB  -  Freeware

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 91.0.

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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  • Firefox 91.0 Screenshots

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    Firefox 91.0 Screenshot 1
  • Firefox 91.0 Screenshot 2
  • Firefox 91.0 Screenshot 3
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What's new in this version:

- Building on Total Cookie Protection, we've added a more comprehensive logic for clearing cookies that prevents hidden data leaks and makes it easy for users to understand which websites are storing local information
- Firefox now supports logging into Microsoft, work, and school accounts using Windows single sign-on
- The simplify page when printing feature is back! When printing, under More settings > Format select the Simplified option when available to get a clutter-free page
- HTTPS-First Policy: Firefox Private Browsing windows now attempt to make all connections to websites secure, and fall back to insecure connections only when websites do not support it
- We've added a new locale: Scots (sco)
- The address bar now provides Switch to Tab results also in Private Browsing windows
- Firefox now automatically enables High Contrast Mode when "Increase Contrast" is checked on MacOS
- Firefox now does catch-up paints for almost all user interactions, enabling a 10-20% improvement in response time to most user interactions

- Various security fixes