I just updated to Iceweasel 3.5.6, and based on the start page, I decided to do an Iceweasel logo sketch:
This page is mostly empty, and un-styled (mostly on purpose).
If you want this page to be better, translated in your native language, and/or more appealing to the eye, please send a message to the pkg-mozilla-maintainers list with your propositions.
There are many ways non-developers can help improve Iceweasel:
There are many ways developers can help, too ;).
In all cases, you may want to contact the pkg-mozilla-maintainers list.