Mozilla Firefox before 38.0 on Android does not properly restrict writing URL data to the Android logging system, which allows attackers to obtain sensitive information via a crafted application that has a required permission for reading a log, as demonstrated by the READ_LOGS permission for the mixed-content violation log on Android 4.0 and earlier.
http://www.mozilla.org/security/announce/2015/mfsa2015-52.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.securityfocus.com/bid/74611