When you use Mozilla(Firefox), it says you have to have GTK+, but I thought it was used for editing graphics for your GUI environment and nothing else. So, how come GTK is needed?
Do you have to design your own...ur...(short english)...shape for Mozilla?

GTK is an acronym for The GIMP Toolkit. GIMP is an acronym for GNU Image Manipulation Program. GNU is an acronym for GNU's Not Unix (and so on). But really, GTK is what provides programs with all those widgets you use. Widgets are the things like file selection dialogs and address bar areas. Don't confuse GTK with The GIMP, however. The GIMP is a great program for editing images which is what GTK is based off of I believe (someone correct me here if I'm wrong please). So to answer your question, GTK is needed so Mozilla can easily draw all the controls it needs, and no you don't have to (can't, really) from your own "shape" for Mozilla. You can however, theme it.

GTK: GimpToolKit. It is a set of widgets (precoded buttons,menus) for the GIMP. GNOME decided to use it too. And now Mozilla uses it.

Wow, i nevr thought about it that way..
So GTK stands for
The GIMP Toolkit
THe GNU Image Manipulation Program Toolki
The GNU's Not UNIX Image Manipulation Program Toolkit


No wonder its GTK

Now if only UNIX had an acronym...