How to install iceweasel 3.5 in Debian Lenny stable

To install iceweasel 3.5 in debian lenny you need to do the following steps:Iceweasel 3.5 installation on debian lenny1. Add the debian repositories testing and experimental: # echo deb testing main > /etc/apt/sources.list.d/testing.list# echo deb experimental main > /etc/apt/sources.list.d/experimental.list 2. Leaving the stable distribution on by default: # echo ‘APT::Default-Release “stable”;’ > /etc/apt/apt.conf.d/default