User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.3a2pre) Gecko/20100214 Minefield/3.7a2pre
Here a link to how this works in Webkit:
here is an example of using scrollbars in ui widgets:
This is bug 77790 isn't it?
Post about how Mozilla Bespin needs custom scrollbars:
"That being said, at least we do have the ability to do this kind of thing now. I hope that other browsers follow WebKit in this instance."
*** This bug has been marked as a duplicate of bug 77790 ***