39.0beta
Firefox Beta

May 28, 2015

Version 39.0beta, first offered to Beta channel users on May 28, 2015

New

Fixed

  • Improve performance of IPv6 fallback to IPv4

  • Fix incomplete downloads being marked as complete by detecting broken HTTP1.1 transfers

  • Security state indicator on a page now correctly ignores loads caused by previous pages

  • Fixed an issue where a Hello conversation window would sometimes fail to
    open

Changed

  • Removed support for insecure SSLv3 for network communications

  • NPAPI Plug-in performance improved via asynchronous initialization

  • Performance of displaying dashed lines is improved (Mac OS X)

  • Malware detection service for downloads now covers common Mac file types

Developer

Web Platform

All Firefox Beta downloads