iceweasel - security update

Multiple security issues have been found in Iceweasel, Debian’s version
of the Mozilla Firefox web browser: Multiple memory safety errors
and implementation errors may lead to the execution of arbitrary code,
information leaks or denial of service.

For the stable distribution (wheezy), these problems have been fixed in
version 31.4.0esr-1~deb7u1.

For the unstable distribution (sid), these problems have been fixed in
version 31.4.0esr-1.

We recommend that you upgrade your iceweasel packages.