Firefox Release

May 14, 2015

Version 38.0.1, first offered to Release channel users on May 14, 2015

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


  • Systems with first generation NVidia Optimus graphics cards may crash on start-up (1154703)

  • Users who import cookies from Google Chrome can end up with broken websites (1162205)

  • Large animated images may fail to play and may stop other images from loading (1161859)

  • WebRTC H264 video streams from CiscoSpark native clients are not decoded correctly. (Fixed in Firefox ESR 38.0.1; was already fixed in Firefox 38.0) (1162251)


  • Responsive images do not update when the enclosing viewport changes

All Firefox downloads