EPSS
Percentile
74.2%
Mozilla Firefox before 49.0 does not properly restrict the scheme in favicon requests, which might allow remote attackers to obtain sensitive information via unspecified vectors, as demonstrated by a jar: URL for a favicon resource.
bugzilla.redhat.com/show_bug.cgi?id=1377675
www.mozilla.org/security/announce/2016/mfsa2016-85.html