Actually it is good not to have this browser come with everything initially, because that was easy for me to do and it got me involved and builded alittle confidence to know I can participate in further customizations.
I tried making a html/javascript browser myself-
http://dennis.psws.net/
Faux Browser but you can imagine it is not Progammer's level.
I tried Linux before that and had no good results at all.
I like IE But I think people need well this- open source!
Well anyway glad it is easy for laypeople to customize!