Firefox controls are ugly in Linux
This little article gives instructions on how to make your input controls (input fields, buttons, drop-down lists) look nicer in Linux. I tried and it worked pretty well. The buttons end up very slightly rounded, which is better than the GTK1-like crudely-3D blocky things I had otherwise. The colors of the controls changed to match my QT theme too, which is nice.

Thanks for the link, it's a good opportunity to fix the crappy looks until they finally decide just to use the styles the system already uses (I hope the 3.0 Version does that).