Multiple security issues have been found in Iceweasel, Debian"s version of the Mozilla Firefox web browser: Multiple memory safety errors, integer overflows, buffer overflows, use-after-frees and other implementation errors may lead to the execution of arbitrary code, bypass of the same-origin policy or denial of service. Debian follows the extended support releases of Firefox. Support for the 31.x series has ended, so starting with this update we"re now following the 38.x releases.