1. Mozilla Firefox For Developers
2. Firefox Developer Browser
3. Firefox For Developer Edition

Trash the current Firefox application to do a clean install. Install the version that you have downloaded (3.6.28). Do not select to remove your personal data, your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks or other personal data. See also: Installing Firefox on Mac. Firefox regular on the left, Firefox Developer on the right. When you install Firefox Developer, you don’t have to worry about it affecting the setup you currently have with regular Firefox; you can install both applications side by side and they will function independently. This is due to Firefox setting up different user profiles for each. To open the console in Firefox, use this keyboard shortcut: Cmd + Option +K (on a Mac) or Cmd +Shift +J (on Windows). As an alternative, you could right-click on the webpage and click 'Inspect Element,' and the developers window will appear. Click the 'Console' tab in that window.

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.

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.

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.

Mozilla Firefox For Developers

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 .

Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher. Visit this Apple Support page to find your Mac OS version.

Firefox Developer Browser

If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version that Apple supports. Visit this Apple Support page to learn more about upgrading your Mac.

Firefox For Developer Edition

While insecure versions of Firefox will continue to work on OS X 10.8 and earlier, using an up-to-date version of Firefox on a supported version of Mac OS will provide you with the best and safest user experience.