Download Firefox

Firefox is no longer supported on Windows 8.1 and below.

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

Firefox is no longer supported on macOS 10.14 and below.

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

Firefox Privacy Notice

Firefox 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.

90.0 Firefox Release

July 13, 2021

Version 90.0, first offered to Release channel users on July 13, 2021

We'd like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox!




  • The "Open Image in New Tab" context menu item now opens images and media in a background tab by default. Learn more

  • Most users without hardware accelerated WebRender will now be using software WebRender.

  • Improved software WebRender performance

  • FTP support has been removed



  • Support for Private Fields (TC39 proposal, stage 3) is available in DevTools. The support includes: object inspection, autocompletion, expression evaluation, variable tooltips, and pretty printing (bug)

  • The Network panel shows a preview of HTTP requests for fonts in the Response tab (bug)

    Network panel font preview screenshot

Web Platform

  • Support for Fetch Metadata Request Headers, which allows web applications to better protect themselves and their users against various cross-origin threats.

  • Added the ability to use client authentication certificates stored in hardware tokens or in Operating System storage.


  • Printing a page with scaling may result in truncated output (bug 1720621)

Get the most recent version

All Firefox downloads