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

Firefox for Mac

Firefox 12.0

  -  30.14 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 12.0.


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 12.0 Screenshots

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    Firefox 12.0 Screenshot 1
  • Firefox 12.0 Screenshot 2
  • Firefox 12.0 Screenshot 3
  • Firefox 12.0 Screenshot 4
  • Firefox 12.0 Screenshot 5

What's new in this version:

- NEW: Page Source now has line numbers
- CHANGED: Line breaks are now supported in the title attribute
- CHANGED: Improvements to "Find in Page" to center search result
- CHANGED: URLs pasted into the download manager window are now automatically downloaded
- DEVELOPER: Support for the text-align-last CSS property has been added
- DEVELOPER: Experimental support for ECMAScript 6 Map and Set objects has been implemented
- FIXED: Various security fixes
- FIXED: Some TinyMCE-based editors failed to load (739141)
- FIXED: OS X: WebGL performance may be degraded on some hardware (713305)

Known Issues:
- Unresolved: If you try to start Firefox using a locked profile, it will crash (see 573369)
- Unresolved: For some users, scrolling in the main GMail window will be slower than usual (see 579260)
- Unresolved: Some synaptic touch pads are unable to vertical scroll (see 622410)