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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.

37.0 Firefox Release

March 31, 2015

Version 37.0, first offered to Release channel users on March 31, 2015

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


  • Heartbeat user rating system - your feedback about Firefox

  • Yandex set as default search provider for the Turkish locale

  • Bing search now uses HTTPS for secure searching

  • Improved protection against site impersonation via OneCRL centralized certificate revocation

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



  • Disabled insecure TLS version fallback for site security

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

  • Extended SSL error reporting for reporting non-certificate errors

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

  • Improved performance of WebGL rendering on Windows


Web Platform

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

  • Added support for CSS display:contents

  • IndexedDB now accessible from worker threads

  • New SDP/JSEP implementation in WebRTC

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