Installing Mozilla Firefox on Your Computer

Installing Mozilla Firefox web browser on your computer is easy and straight forward. Download a Firefox installer file, run it, click a few times and you're ready to browse!

The guide below shows you how to install Mozilla Firefox Extended Support Release (ESR) version on a Windows 10 computer. Installing the regular Firefox (Rapid Release) version is just as easy. If you have a Mac, follow along and replace the Windows specific instructions with those for Mac.

Installing Mozilla Firefox on Windows 10

Installing Mozilla Firefox web browser on your computer only takes a few minutes. After you install the browser, you can start using it right away. There is no need to restart your computer.

1) Start any web browser

Start a web browser, like Google Chrome or Microsoft Edge. In this example we use Microsoft Edge because it already exists on every Windows 10 computer.

2) Go to

With Microsoft Edge (or another browser) go to the Mozilla Firefox website where you can find Firefox installers for various operating systems including Windows, MacOS and Linux.

The link is:

3) Select Firefox ESR and click on "Download Now":

These instructions guide you through the installation of the Firefox Extended Support Release (ESR), but you can select the regular Firefox release as well - it is called "Firefox" in the below "Which browser would you like to download?" pull-down menu.

4) Click on the "Save" button on the bottom of your screen:

This will save the Mozilla Firefox installer file to your computer.

5) Click on the "Run" button on the bottom of your screen:

After you save the Mozilla Firefox installer file on your computer, run it to start the Firefox installation.

6) On the "Welcome to the Mozilla Firefox Setup Wizard" screen, click "Next":

On the first Firefox installation screen, just click "Next".

7) On the "Setup Type" screen, select "Standard" and click "Next":

Standard version is preferred because it installs Firefox in a predictable place on the computer. There are special cases when you may want to do a Custom install (maybe you're a web developer and have multiple versions of Firefox installed on your computer to make sure your software works with all of them), but for the most of us it is not needed.

8) On the "Summary" screen, click "Install":

This will start installing Mozilla Firefox in the default Firefox directory on your computer.

9) Wait until the Mozilla Firefox Installation finishes:

Depending on how fast your computer is, this may take only a few seconds, or a little more time (but not very long).

10) On the "Completing the Mozilla Firefox Setup Wizard" screen, click "Finish":

Almost there..

11) When Firefox starts the first time, un-check the checkbox next to "Always perform this check when starting Firefox" and click "Not now":

It is a good idea to leave Microsoft Edge as the default browser on a Windows computer (and Safari on a Mac). This is because sometimes the operating system expects its default web browser to do a certain thing. You may spend a lot of time troubleshooting a random problem that may turn out to be as simple as letting the operating system use the web browser it prefers.

This is unfortunate and due to operating systems integrating web browsers for more control over competing browsers. Microsoft does it with Edge, Apple does it with Safari, and Google does it with Chrome.

But unless you are a professional, this is not the right battle to fight. You can instead vote with your purse/wallet and avoid products from those companies; and exercise your freedom of choice by using a web browser that improves your security and privacy like Mozilla Firefox instead of web browsers that computer and software manufacturers push on you.


You're good to go!  We will cover installing additional privacy and security features (web browser extensions/add-ons) next.

  1. Mozilla Firefox
  2. Installing Mozilla Firefox