You can fix it buy replacing the html with the following:-
<a href="#top" onclick="self.scrollTo(0, 0); return false;">Top</a>
instead of whats there currently:- <a href="#top" onclick="scroll(0,0); return true;">
however it is as you say working fine in MS Hedge just not in chrome and FF.
Id just bodge in the html if it was me dont think its worth upgrading VB, the squeeze isn't worth the cheese as they say.