Firefox 48 Opera (last version for Lion). A modern version of Firefox modified to work on older Mac OS X versions, including 10.6 Snow Leopard, 10.7 Lion, and 10. Firefox 48.0.2 Free. Mozilla Firefox is a free web browser for Windows users. 4.2 (41,135 votes). Firefox for Mac OS X. Firefox 87.0 (latest. Firefox 48 is the last Firefox version to support Mac OS X Snow Leopard, Mac OS X Lion, and OS X Mountain Lion. Additionally, support for old processors without SSE2 extensions such as the AMD Athlon XP and Pentium III was dropped. Firefox 49 was released on September 20, 2016 for both desktop and Android. Silent installation and uninstallation switches for Mozilla Firefox 48.0.2 for Mac.

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Firefox Description

Firefox is a free open source web browser that is a continuation of the Mozilla Application Suite and uses the Gecko rendering engine. Firefox has numerous popular features including tabbed browsing, spell checking, and the ability to add numerous community developed plugins.

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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.

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

To download and install Firefox:

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.

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 .