Kmeleon is geekier than Firefox, in the sense that Kmeleon's interface is more customizable. I've used both, and there are things I can do with Kmeleon's interface that are impossible in Firefox without serious XUL hacking. (I've spent time with XUL configuring Firefox's context menus, so I know whereof I speak.)
After using Kmeleon for more than a year, I switched to Firefox because Kmeleon at the time was based on an out-of-date Mozilla core (a continuing problem for the Kmeleon community). It was worth losing some tweakability to gain bug fixes and better security.
Kmeleon is geekier than Firefox, in the sense that Kmeleon's interface is more customizable. I've used both, and there are things I can do with Kmeleon's interface that are impossible in Firefox without serious XUL hacking. (I've spent time with XUL configuring Firefox's context menus, so I know whereof I speak.)
After using Kmeleon for more than a year, I switched to Firefox because Kmeleon at the time was based on an out-of-date Mozilla core (a continuing problem for the Kmeleon community). It was worth losing some tweakability to gain bug fixes and better security.