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 Beta and Developer Edition
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.

37.0beta Firefox Beta

February 26, 2015

Version 37.0beta, first offered to Beta channel users on February 26, 2015

New

  • Heartbeat user rating system - your feedback about Firefox

  • Bing search now uses HTTPS for secure searching

  • New preferences implementation enabled for the first half of the beta cycle

  • Improved protection against site impersonation via OneCRL centralized certificate revocation

  • Opportunistically encrypt HTTP traffic where the server supports HTTP/2 AltSvc

Changed

  • Disabled insecure TLS version fallback for site security

  • Improved certificate and TLS communication security by removing support for DSA

  • Added support for e-mail name constraints in certificates

  • Extended SSL error reporting for reporting non-certificate errors

  • TLS False Start optimization now requires a cipher suite using AEAD construction

Developer

Web Platform

  • Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube (Windows Vista or later only)

  • WebSocket now available in Web Workers

  • Added support for CSS display:contents

  • IndexedDB now accessible from worker threads

Get the most recent version

All Firefox Beta downloads