How to Run 32-Bit Firefox on 64-Bit Systems


According to Mozilla, there is no 64-bit release of the Firefox browser at this time. However, Firefox 4, the most recent version of the program as of the time of publication, is compatible with 64-bit operating systems such as Windows Vista, 7 and Mac OS, even though the Firefox application is only a 32-bit program. Therefore, you can install the 32-bit version on your computer as you would install any program.


  • Download the most recent version of Mozilla Firefox from the official website.

  • Double-click the download file to begin installation and proceed through the wizard, choosing the type of installation -- for example, choose "automatic" to use default settings -- and installation location.

  • Launch Firefox after installation, when prompted, and close the wizard after installation has finished.

Tips & Warnings

  • If using a Mac, double-clicking the download will show the Firefox application icon. You should then drag the icon to your applications folder and eject the disc image by pressing the "Command" and "E" keys simultaneously. Firefox will be ready to use.

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  • Photo Credit Alexander Hassenstein/Getty Images News/Getty Images
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