What's the Latest Version of Firefox

The latest versions of firefox:

Windows

Windows 11

Windows 10

Windows 8.1

Windows 8

Windows 7

Windows XP

macOS

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Firefox Latest Version – What You Need to Know

Maintaining the latest version of Firefox ensures you have optimal performance, robust security, and the latest features. Wondering what the latest version of Firefox is and how to update? You're in the right place!

What is the Latest Version of Firefox?

The latest stable release is Firefox 153. Mozilla ships Firefox on a rapid release cycle, rolling out a new major version roughly every four weeks so you always get the newest features, security patches, and performance gains from its Gecko browser engine. The interactive table at the top of this page always reflects the exact current build, pulled directly from Mozilla's release data.

Firefox is developed by Mozilla, the open-source project backed by the non-profit Mozilla Foundation. Alongside the standard rapid release, Mozilla maintains the Extended Support Release (ESR) plus the Beta, Developer Edition, and Nightly channels — each explained in more detail below.

How to Update to the Latest Version of Firefox?

Updating your Firefox browser is a piece of cake. Just follow these simple steps:

• Open Firefox.
• Click the menu button (three horizontal lines) in the top-right corner.
• Select Help and then About Firefox.
• Firefox will check for updates and download them automatically.
• Restart Firefox to complete the update.

Troubleshooting tip: If the About Firefox window doesn't start downloading an update automatically, close and reopen it, confirm you have an active internet connection, and make sure you have permission to install software on your device. On managed or enterprise machines, updates may be controlled by an administrator or group policy. As a last resort, download a fresh installer from Mozilla's official website and run it over your existing installation — your bookmarks, passwords, and settings are preserved.

What is Firefox ESR (Extended Support Release)?

The Firefox Extended Support Release (ESR) is a version of Firefox built for organizations — schools, universities, businesses, and government agencies — that need a stable, predictable browser they can deploy at scale. Rather than following the rapid release cycle, an ESR stays on the same major version for about a year and receives only security and stability fixes during that time. That gives IT teams a long, unchanging platform to certify their internal web apps against, without a new feature release landing every four weeks.

The key difference comes down to cadence and change. The standard rapid release channel advances a full major version roughly every four weeks, bringing new features, web-platform APIs, and interface changes. Firefox ESR instead holds a single major version steady for its full support window, so the only thing that changes are backported security patches. When one ESR line reaches end of life, Mozilla provides an overlap period so administrators can migrate to the next ESR on their own schedule. At the time of writing, the established extended support line is Firefox ESR 140, and Firefox ESR 153 has shipped as the next ESR — the two run side by side during the overlap window, giving administrators time to certify their internal apps before ESR 140 reaches end of life.

Firefox Release History and Recent Version Timeline

Firefox reaches a new milestone roughly every four weeks. Here's a quick look at recent stable releases and the extended support line, along with the kind of changes each shipped. For the complete breakdown of every release, Mozilla publishes the official Firefox Release Notes.

Note: version numbers and dates above are indicative and refreshed periodically. The interactive table at the top of this page always shows the most current release data.

Firefox Beta, Developer Edition, and Nightly: How to Test Pre-Release Versions

Firefox doesn't ship as a single build. Mozilla maintains several parallel channels so developers and QA teams can preview and test features long before they reach the stable release. Testing against these pre-release builds is the best way to catch rendering and compatibility issues before an update rolls out to your users.

Because most visitors upgrade within days of a new stable release, it pays to test ahead of the cycle. With TestMu AI you can run your site against Firefox Beta and other pre-release builds across real desktop and mobile environments — catching regressions before they reach your users.

Why Should You Update Your Firefox Browser?

Keeping your browser updated is crucial for a few reasons:

• Enhanced Privacy: Gain stronger protections against tracking and data breaches.
• Reduced Bugs: Address known issues and bugs in previous versions.
• Faster Page Loading: Enhance page loading speeds, even on slower connections.

What's Next for Firefox Updates?

Mozilla releases Firefox updates every 4-5 weeks. Keep this page bookmarked to easily check for the latest versions.

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