where is url("chrome://sbcb Rated 5 out of 5 stars

Please, where is this location of folder "sbcb"!?
I´m using Namoroka, but, before, I have had with Firefox 3.6.12
the same problem....where is this folder?!
searching at big "Computer"....nothing!
only my own very old secure folder from WinXP with
my own png-images for some Buttons!