Firefox ESR
Release Notes

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

Download Firefox — English (US)

Your system may not meet the requirements for Firefox, but you can try one of these versions:

Download Firefox — English (US)

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit

Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR

Firefox Privacy Notice

Version 78.9.0, first offered to ESR channel users on March 23, 2021

Various stability, functionality, and security fixes

Developer Information

Get the most recent version

Download Firefox — English (US)

Your system may not meet the requirements for Firefox, but you can try one of these versions:

Download Firefox — English (US)

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit

Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR

Firefox Privacy Notice

All Firefox ESR downloads

Firefox for Desktop

Firefox for Android

Firefox for iOS

Firefox Focus

Privacy Promise

Firefox Blog

Release Notes

Firefox Monitor

Facebook Container

Pocket

Mozilla VPN

Product Promise

Firefox Relay

MDN Plus

Mozilla Manifesto

Mozilla Foundation

Get involved

Stories

Leadership

Careers

Mozilla Blog

Mozilla Hubs

Firefox Developer Edition

MDN Web Docs

Common Voice

Firefox ESR
Release Notes

78.9.0

Firefox ESR

Fixed

Developer

Get the most recent version