Firefox is for everyone Available in over 90 languages, and compatible with Windows, Mac and Linux machines, Firefox works no matter what you’re using or where you are. Make sure your operating system is up to date for the best experience.

Windows 10 may show you a warning when installing apps that aren't from the Microsoft store. See Windows 10 warns me to use a 'Microsoft-verified' app for more information.
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How To Get Firefox On Mac

  • Dec 04, 2019 To download Mozilla Firefox on your Mac, you'll need to use another browser to get to Mozilla's website. Once you've downloaded Firefox onto your Mac, you can install it like you would any other.
  • Installing Firefox on Mac. 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. Click Download Firefox.
  • Click the Firefox Free Download button to download the file to your Windows or Mac computer. Install the file on your system to start using Firefox 10.

This article explains how to download and install Firefox on Windows using a simplified online installer. (If you need a full, offline installer or custom options, see For advanced users, below.)

  • To update Firefox from a previous version, see Update Firefox to the latest release.
This article only applies to Windows.For instructions to install Firefox on Mac, see How to download and install Firefox on Mac.For instructions to install Firefox on Linux, see Install Firefox on Linux.

Before installing Firefox, see the Firefox System Requirements to make sure that your computer has the required operating system and recommended hardware.

Do not install Firefox using a limited Windows XP account. For more information, see Microsoft's support article How to determine your user account type in Windows.

  1. Visit this Firefox download page in any browser, such as Microsoft Internet Explorer or Microsoft Edge.
  2. Click the button. The Firefox Installer that downloads will automatically offer you the best available version of Firefox for your computer.
    • If you use Microsoft Edge or Internet Explorer, a notification bar will appear at the bottom of the page with an option to open or run the Firefox Installer file.
    • Click Open file on Microsoft Edge or on Internet Explorer, to start the process.
    • In other browsers, you may need to first save the Firefox installer to your computer, then open the file you downloaded.
      Note: If you see an Open File - Security Warning dialog, click or .

  3. The User Account Control dialog may open, to ask you to allow the Firefox Installer to make changes to your computer. If this dialog appears, click to start the installation.
  4. Wait for Firefox to finish installing.
  5. When the installation is complete, Firefox will open.
Note: A notification bar with a button may be shown at the bottom of the page, if Firefox was previously installed. See Refresh Firefox - reset add-ons and settings to learn more.
Congratulations, you are done installing Firefox!

Double-click the Firefox icon that was placed on the desktop whenever you want to go online.

Having problems?

Here are some articles that can help you:

If you need more help, you can always get community support.

Version

The streamlined Firefox Installer installs a suitable Firefox version for your language and operating system. For example, on 64-bit Windows, it installs the 64-bit version of Firefox (details here). To install Firefox in another language or operating system, or if you need a full, offline installer with custom options, download the Firefox Setup file from this download page. Options available in the full, offline installer are described in the article, Custom installation of Firefox on Windows.

I teach at several schools. I wish I could tell the schools to install Firefox extensions on the computer (like Firebug and Web Developer) but alas, this is not possible. So the next best thing is to show the students how to install extensions before class begins and it saves some time.

The folder where extensions are stored on Mac:
~/Library/Application Support/Firefox/Profiles/[profile name]/extensions

If you want to back up all your Firefox personal information on a Mac:
http://support.mozilla.com/en-US/kb/Backing%20up%20your%20information

The folder where extensions are stored on PC:
C:Documents and SettingsWindows user nameApplication DataMozillaFirefoxProfiles. The profile with the “extension” .default should be yours. (When you download firefox extensions, they are put in this folder. So you just have to copy this folder replace the extensions folder on a Mac or PC and it will save you from having to keep reinstalling firefox plugins on multiple computers)