Most of us might be finding it difficult to run Mozilla Firefox 3 on Debian Etch, because of the old gtk libraries. And many might have problems installing the libraries themselves. Mozilla Firefox requires at least gtk 2.10. Here is a small howto I found to solve the problem. Basically it is to install the required libraries in a different location and make Firefox3 use them. I am now looking on try to compile the libraries statically into the executable, which might be better :)