Even though my events are properly prenting default actions, clicking in text and then Shift-clicking in other text is causing a selection. This is undesirable behaviour in this case, since I'm using Shift-click to multi-select these elements.
Is there something I need to do to specifically disable selection here?
EDIT: Found solution to my own problem here. Sorry for wasting people's time.
I can't believe this question is marked as answered when none of the answers provide what is originally asked. The question is how to prevent selection on SHIFT+Click, not preventing text from being selected at all. Well, it's the Internet...
andreak No, that's an XY problem.
Which browser uses -kthml-?
I think that is Konqueror