This article explains how to download and install Firefox on a Mac.

  • If you are updating from a previous version of Firefox, see Update Firefox to the latest release.
Note: This article only applies to Mac. For instructions to install Firefox on Windows, see How to download and install Firefox on Windows.For instructions to install Firefox on Linux, see Install Firefox on Linux.
Make sure your Mac meets the System Requirements for Firefox.

If you use an old version of OS X, see these articles for more information:

Note:Firefox version 83 and higher support both Intel-based Macs (x86 architecture) and Apple devices with the new ARM-based CPU (Apple Silicon). Firefox 83 runs on new Apple Silicon devices by way of Apple's Rosetta 2 emulation software and thus performance speeds may suffer. Firefox 84 and higher versions will run natively (not under emulation).
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To download and install Firefox:

Firefox Mac OS X 10.9, 10.10 and 10.11 users move to Extended Support Release Note: Firefox version 83 and higher support both Intel-based Macs (x86 architecture) and Apple devices with the new ARM-based CPU (Apple Silicon).

  1. Visit the Firefox download page in any browser (for example, Safari). It will automatically detect the platform and language on your computer and recommend the best version of Firefox for you.
  2. Click .
    • Note: If you want to have a choice of the language for your Firefox installation, click the Download options and other languages link instead.
  3. Once the download has completed, the file (Firefox.dmg) may open by itself and pop open a Finder window containing the Firefox application. Drag the Firefox icon on top of the Applications folder in order to copy it there.
    Note: If you do not see this window, open the Firefox.dmg file that you downloaded.
  4. After dragging Firefox to the Applications folder, hold down the control key while clicking in the window and select Eject 'Firefox' from the menu.
Complete the steps above before running Firefox. Do not run Firefox directly from the Firefox.dmg file, as this can result in issues such as lost data and settings.

Tip: You can add Firefox to your dock for easy access. Just open your Applications folder and drag Firefox to the dock.

Firefox is now ready for use. Just click on its icon in the dock or Applications folder to start it.

When you first start up Firefox, you will be warned that you downloaded Firefox from the Internet. Because you download Firefox from the official site, click .

Upon installation, Firefox will not be your default browser, which you'll be notified about. That means that when you open a link in your mail application, an Internet shortcut, or HTML document, it will not open in Firefox. If you want Firefox to do those things, click . If you're just trying out Firefox or simply do not wish to set Firefox as your default browser, click .

What is the __MACOSX folder?

The __MACOSX folder is created when a Mac user creates and archive (also called a zip file) using the Mac. If the Mac user sends the zip file to another Mac user, the folder will not appear - this is a hidden folder. Many files on the Mac have two parts: a data fork, and a resource fork. The built in zip utility on the Mac sequesters all of the resource forks into this __MACOSX folder when creating a zip archive. For certain files (like some font files), these resource forks are necessary to be left intact. ZipFiles4PC also has an option to preserve the resrouce forks without creating the __MACOSX folder.

When the Mac user sends the zip file to a PC user, however, all of the hidden files are shown. PC users are often confused by these (seemingly superfluous) files and folders. You can use our Zip Files for the PC utility to create zip files that contain neither the __MACOSX folder, nor the .DS_store files! You can download the free trial version today (see the link on the left) or you can buy it now using PayPal.

Page Last modified: July 18, 2014

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Supported OSs:

Big Sur (11.0)
Catalina (10.15) 64-bit
Mojave (10.14)

Floxels Mac Os X


High Sierra (10.13)
MacSierra (10.12)
El Capitan (10.11)
Yosemite (10.10)
FloxelsMavericks (10.9)
Mountain Lion (10.8)
Lion (10.7)
Snow Leopard (10.6)
Leopard (10.5)
Tiger (10.4)
Panther (10.3)

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