Firefox version 78 is the last supported Firefox version for Mac users of OS X 10.9 Mavericks, OS X 10.10 Yosemite and OS X 10.11 El Capitan. These users will be moved to the Firefox Extended Support Release (ESR) channel by an application update. This will provide security updates until the next ESR update in July 2021, after which the. Mac Root Cert 2; Mac Root Cert 3; Mac Root Cert 4; Mac Root Cert 5; When you double-click the Mac Root Cert 3 and 4, you’ll need to tell your browser to always trust them. Click the button like you see below: Additional Steps for Firefox. If you’re using Mozilla Firefox as your primary browser, you’re going to need to perform some. Firefox Lockwise. Take the passwords you’ve saved in Firefox with you everywhere. Download for iOS; Download for Android; Support; Firefox Monitor. See if your personal info has been leaked online, and sign up for future breach alerts.
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.
- 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.
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 .

- Ensure your CAC reader works with Mac
- Check to ensure your Mac accepts the reader
- Check your Mac OS version
- Check your CAC’s version
- Update your DOD certificates
- Guidance for Firefox Users
- Look at graphs to see which CAC enabler to use
Step 1: Purchase a Mac Friendly CAC Reader
Purchase a CAC reader that works for your Mac. There are only a couple that you can choose from and I’ve listed them below.
If you already have a CAC reader and it isn’t Mac friendly, you could update the firmware, however, for the non-tech savvy people out there, it’s probably better to just purchase a new one and save the headache – they’re only ~$11-13 dollars.
Best Mac Compatible CAC USB Readers
Best Mac Compatible CAC Desk Readers
Download Firefox For Mac 10.5.8
Step 2: Plug in and Ensure It’s Accepted
Once you have your CAC reader, plug it into your Mac and ensure your computer recognizes it. If you have one of the CAC readers we suggested above, then you should be good to go.
If for some reason your CAC reader isn’t working, you may need to download the appropriate drivers for your CAC reader. You can find these drivers on the Reader’s Manufacturer Website.
Step 3: Update Your DOD Certificates
Now that you have your CAC reader connected and accepted on your Mac computer, it’s time to ensure you have the right certificates in order to access DOD CAC required web pages.
Procedure for Chrome and Safari
- Type ⇧⌘U (Shift + Command + U) to access your Utilities
- Find and Double click “Keychain Access”
- Select “Login” and “All Items”
- Download the following five files and double click each once downloaded so as to install in your Keychain Access.
- When you double-click the Mac Root Cert 3 and 4, you’ll need to tell your browser to always trust them. Click the button like you see below:
Additional Steps for Firefox
If you’re using Mozilla Firefox as your primary browser, you’re going to need to perform some additional steps. First, perform the same steps that you did for Chrome and Safari. Afterwards, follow these additional steps to get started.
- Download All Certs zip and double click to unzip all 39 files
- While in Firefox, click “Firefox” on the top left, then “Preferences”
- Then Click “Advanced” > “Certificates” > “View Certificates”
- Then Click “Authorities” and then “Import”
- Import each file individually from the “AllCerts” folder. When you do this, the below box will popup. Check all three boxes and click “OK”
Step 4: Download and install CAC Enabler
Choosing the right CAC enabler can be pretty tricky. It all depends on what OS you have installed, how you installed it, and even what kind of CAC Card you have!
In order to get the right enabler, be sure to visit our trusty guide to Mac CAC Enablers! It’ll walk you through exactly which enabler is right for you.
CAC Access at Home Success
Now that you have a CAC reader, certificates, and a CAC Enabler, you should now be able to access any CAC-enabled website and log on using your CAC password and data.
Common Reasons Why Your CAC Card Won’t Work On Your Mac
Download Firefox For Mac 10.10.5



Ensure Your CAC Card Meets the Standards: In order for your CAC card to work, it must meet the minimal requirements. Currently, there are only four types of CAC cards that can be used. The ensure you have the right CAC card for online access, flip your CAC card to the back and if you have one of the below numbers written on the top left, then you are good to go:
Firefox Download Mac 10.6.8
- G&D FIPS 201 SCE 3.2
- Oberthur ID one 128 v5.5 Dual
- GEMALTO DLGX4-A 144
- GEMALTO TOP DL GX4 144
If you do not have any of the above written on the back, then proceed to your nearest PSD to get a new CAC card issued.