CVE-2016-1949
Mozilla Firefox before 44.0.2 does not properly restrict the interaction between Service Workers and plugins, which allows remote attackers to bypass the Same Origin Policy via a crafted web site that triggers spoofed responses to requests that use NPAPI, as demonstrated by a request for a crossdomain.xml file.
Date published : 2016-02-12
http://www.mozilla.org/security/announce/2016/mfsa2016-13.html