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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.

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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.

38.2.0 Firefox ESR

August 11, 2015

Version 38.2.0, first offered to ESR channel users on August 11, 2015

Fixed

  • Firefox may become unresponsive after right-clicking Flash content on Windows 8

  • Various security fixes

  • Firefox may crash during mp4 video playback

  • Branded Firefox application does not open URLs in system default browser

  • Significant memory leak with GreaseMonkey add-on

  • crash [@ RtlEnterCriticalSection | MessageLoop::PostTask_Helper] on browser shutdown

  • Browser UI becomes unresponsive state when using Unity Web Player Plugin

  • ESRs will not build on hppa platform

  • crash in mozilla::layers::SyncObjectD3D11::FinalizeFrame()

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