Log Message:
Update to 38.3.0

Changelog:
Fixed in Firefox ESR 38.3

    2015-113 Memory safety errors in libGLES in the ANGLE graphics library
    2015-112 Vulnerabilities found through code inspection
    2015-111 Errors in the handling of CORS preflight request headers
    2015-110 Dragging and dropping images exposes final URL after redirects
    2015-106 Use-after-free while manipulating HTML media content
    2015-105 Buffer overflow while decoding WebM video
    2015-101 Buffer overflow in libvpx while parsing vp9 format video
    2015-100 Arbitrary file manipulation by local user through Mozilla updater
    2015-96 Miscellaneous memory safety hazards (rv:41.0 / rv:38.3)