If you are updating from a previous version of Firefox, see Update Firefox to the latest release.
Thank you for downloading Firefox for Mac from our software library. This application is distributed free of charge. The package you are about to download is authentic and was not repacked or modified in any way by us. The version of the Mac application you are about to download is 81.0.2. The software is periodically scanned by our antivirus. Download Mozilla Firefox for Mac OS X (Free) Released in late June, Java for Mac OS X 10.6 Update 5 delivered improved compatibility, security, and reliability by updating Java SE 6 to 1.6.026.
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:
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 .
Note: If you want to have a choice of the language for your Firefox installation, click the Download options and other languages link instead.
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.
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.
Download Firefox 51 Mac Os X
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 .
Firefox 51.0
Windows
Operating Systems (32-bit and 64-bit)
Windows XP SP2
Windows Server 2003 SP1
Windows Vista
Windows 7
Windows 8
Windows 10
Please note that 64-bit builds of Firefox are only supported on Windows 7 and higher.
Download Firefox 51 Mac Os
To install Firefox on a Windows XP system, because of Windows restrictions, the user will have to download Firefox 43.0.1 and then update to the current release.
Firefox Download For Mac Pro
From Firefox 53 planned for April 2017, Windows XP/Vista/Server 2008 are no longer supported. These users should migrate to ESR 52 once available (planned for March 2017).
Recommended Hardware
Pentium 4 or newer processor that supports SSE2
512MB of RAM
200MB of hard drive space
Mac
Operating Systems
Mac OS X 10.9
Mac OS X 10.10
Mac OS X 10.11
Recommended Hardware
Macintosh computer with an Intel x86 processor
512 MB of RAM
200 MB hard drive space
GNU/Linux
Software Requirements
Download Firefox 51 For Windows
Please note that GNU/Linux distributors may provide packages for your distribution which have different requirements.
Firefox will not run at all without the following libraries or packages:
GTK+ 3.4 or higher
GLib 2.22 or higher
Pango 1.14 or higher
X.Org 1.0 or higher (1.7 or higher is recommended)
libstdc++ 4.6.1 or higher
For optimal functionality, we recommend the following libraries or packages: