So after switching to Debian, I have realized that the only drawback this OS contains is the rebranding of Firefox and Thunderbird to Iceweasel and Iceape respectively. Because of this, they have been detached from the main release cycle of Firefox and Thunderbird and are not always up to date.
The latest release of Debian (Squeeze) still contains Iceweasel 3.x which is pretty old. Using the following procedure, I was able to update it to Iceweasel 10 which is way better. You may also be able to install 13 from source.
1. Add the following lines to the end of /etc/apt/sources.list
deb http://backports.debian.org/debian-backports squeeze-backports main deb http://mozilla.debian.net/ squeeze-backports iceweasel-aurora iceweasel-beta iceweasel-release iceweasel-esr icedove-esr iceape-esr
2. Next, update apt:
sudo apt-get update
3. Next, issue this command to upgrade to the latest stable Iceweasel in the Debian Backports repo (which at time of writing this post was 10):
sudo aptitude install -t squeeze-backports iceweasel
Congrats, you have successfully upgraded your Iceweasel! Enjoy Debian. You can use the same process for Icedove, just replace iceweasel with icedove in step 3.