thanks for the suggestion. However, GUI on linux is like black magic to me. It seems that the fonts used may not be related with X but some other font server and that each application may have its own idea of how to handle fonts where unlike Window is through a centralized API.

Beside, my experience with Window is that the anti-aliasing feature is not necessary related to what font I used but how it is rendered and I don't know if the same is true in linux/Mozilla. So even I have replaced the fonts, I may still get the same anti-aliasing feature which gives me the fuzzy feeling. Not to mentioned that I don't know how to install font for Mozilla.