How to download and install Firefox on Mac

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  • Revision id: 20980
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  • Creator: Michael Verdi
  • Comment: New screenshots, rewrote instructions as numbered steps, changed method of virtual disk ejection because the old way won't work in 10.7, added link to Firefox will not start
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  • Reviewed by: AliceWyman
  • Is approved? Yes
  • Is current revision? No
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  • Readied for localization by: AliceWyman
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This article explains how to download and install Firefox on a Mac. If you are upgrading from a previous version of Firefox, see Update Firefox to the latest release.

Current Firefox versions require Mac OS X 10.5 or above and an Intel processor. See all System Requirements. If Firefox won't start after installing it, see this article for help.

Installing Firefox on Mac

  1. Visit in any browser (for example, Apple Safari). It will automatically detect the platform and language on your computer and recommend the best edition(s) of Firefox for you.
  2. Click the green download button to download Firefox.
    Mac Install 1
  3. Once the download has completed, the file (Firefox.dmg) should 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.
    Mac Install 2a
    Note: If you do not see this window, click the Firefox.dmg file that you downloaded to open it.
    Mac Install 2
  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.
    Mac Install 4
  5. You can add Firefox to your dock for easy access. Just open your Applications folder and drag Firefox to the dock.
    Add to Dock
    Firefox is now ready for use. Just click on it's icon in the dock to start it.

Starting Firefox for the first time

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, you can click Open.


Also, Firefox will not be your default browser and you'll be told about that. 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 Yes to set it as your default browser. If not or you are just trying out Firefox, click No.