Mozilla Firefox

Keep Your Firefox Happy!

Make sure you're running the latest, greatest and most secure version.

Frequently asked questions

What is a Firefox software update?

A Firefox software update is a quick download of small amounts of new code to your existing Firefox browser. These small patches can contain security fixes or other little changes to the browser to ensure that you are using the best version of Firefox available.

How do I update Firefox?

By default, Firefox is configured to automatically check for updates for itself and notify you when one is available. When prompted, just click OK and the newest version will be downloaded and installed on your computer. You'll need to restart Firefox to begin using the new version.

You are also able to check for updates manually. For details, check out the step-by-step guide.

How do I know what version of Firefox I am currently on?

It varies slightly depending on the operating system you're using. You can find instructions for your computer here.

Do I need to uninstall my current version of Firefox before upgrading?

No. The new version of Firefox will automatically take the place of your older version. To start the upgrade process, just click the green download button to the right.

Why do I need to update?

Firefox is constantly evolving as our community finds ways to make it better, and as we adjust to the latest security threats. Keeping your Firefox up-to-date is the best way to make sure that you are using the smartest, fastest and – most importantly – safest version of Firefox available.

How long will it take to update?

Not long at all – the entire process just takes a minute or two. Visit our support page for step-by-step instructions.

Will the update affect my settings and bookmarks?

No. A Firefox update will not make any changes to your bookmarks, saved passwords or other settings. However, there is a possibility that some of your Add-ons won’t be immediately compatible with new updates.

If I already have Firefox, and then do a fresh install, what happens to my settings?

Nothing. Re-installing Firefox will not affect your settings, bookmarks or preferences in any way.

Are Firefox updates safe?

Very much so – your security is our top priority. Our open source security process means we have an international community of experts working around the clock to monitor the latest threats. As soon as a security threat is discovered, we write a patch and release an update to stay one step ahead. Downloading Firefox updates is a very important part of staying safe online.

What if I miss an update? Can I check for one myself?

Yes. Firefox is configured to automatically check for updates, but it’s also possible to check for updates yourself.

Follow the step-by-step process