Log Message:
Upgrade from version 38.1.0 to 38.1.1.

Fixes Mozilla Foundation Security Advisory 2015-78:
Same origin violation and local file stealing via PDF reader

 * Fixes CVE-2015-4495 -  It's possible to read local files or
   perform privilege escalation by using a native setter, bug 1178058.
 * Remove PlayPreview registration from PDF viewer, bug 1179262.

ref. https://www.mozilla.org/en-US/security/advisories/mfsa2015-78/