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Firefox 97.0


Firefox is a fast, full-featured Web browser. It offers great security, privacy, and protection against viruses, spyware, malware, and it can also easily block pop-up windows. The key features that have made Firefox so popular are the simple and effective UI, browser speed and strong security capabilities.

Firefox has complete features for browsing the Internet. It is very reliable and flexible due to its implemented security features, along with customization options. Firefox includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, a streamlined browser window that shows you more of the page than any other browser and a number of additional features that work with you to help you get the most out of your time online.

What's new in Firefox 97.0:

  • Firefox now supports and displays the new style of scrollbars on Windows 11.


  • On macOS, we’ve made improvements to system font loading which makes opening and switching to new tabs faster in certain situations.
  • Various security fixes


  • On February 8, we will be expiring the 18 colorway themes of Firefox version 94. This signals the end of a special, limited-time feature set. However, you can hold onto your favorite colorway, as long as you’re using it on the expiration date. In other words, if a colorway is “enabled” in the add-ons manager, that colorway is yours forever. Read more about colorway updates here.
  • Support for directly generating PostScript for printing on Linux has been removed. Printing to PostScript printers still remains a supported option, however.



Community Contributions

With the release of Firefox 97, we are pleased to welcome the developers who contributed their first code change to Firefox in this release, 7 of whom were brand new volunteers! Please join us in thanking each of these diligent and enthusiastic individuals, and take a look at their contributions:

  • bnhunsaker: Bug 1707379 - Firefox raises window when it gains focus when using yabai with focus_follows_mouse with autofocus, but not autoraise
  • Dennis Jackson: Bug 1742617 - Crash in [@ nsDocShell::MaybeFixBadCertDomainErrorURI]
  • Jin Chun: Bug 1704133 - Removing stale probe sw.synthesized_res_count
  • Kevin Daudt: Bug 1745560 - Firefox 91.4 fails to build against wayland 1.20
  • Meg Viar: Bug 1744466 - Make "More from Mozilla" strings localizable

Neia Finch:

  • Bug 1613634 - CoalesceMutationEvents causes excessive page render times
  • Bug 1747922 - Replace MathML font variant constants with enum class

Nick Rishel:

  • Bug 1592731 - Firefox ESR's update failure doorhanger should direct user to the ESR download page
  • Bug 1730110 - Update manual update URL
  • Bug 1746517 - Add query parameter to manual update URL


  • Bug 1742312 - Remove NPAPI related flags
  • Bug 1743102 - Add color-scheme meta tag to remaining compatible about: pages
  • Pier Angelo Vendrame: Bug 1745715 - Bundled fonts should have Base visibility even when they are also system-wide installed


  • Bug 1739515 - Clean up preference for supporting multiple PiP windows
  • Bug 1742585 - PIP button z-index not respected with semi-transparent div
  • Bug 1744633 - Remove unnecessary browser_closePipAfterCloseBrowser.js test for Picture-in-Picture

Download: Firefox 97.0 for Windows | Firefox 32-bit | ~50.0 MB (Freeware)
Download: Firefox 97.0 for Linux | 64-bit | ~70.0 MB
Download: Firefox for MacOS | 123.0 MB
View: Firefox Home Page | Release Notes

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