you mean when you right click on url hotlink or a hotlinks you've created? the later doesn't have any popups (at least I've never seen one) in both cases I don't thinks it's possible
And all I need now is intellectual intercourse, a soul to dig the hole much deeper
Yes, when you put your mouse over a URL, and the 'hand' appears - then right click, a menu pops up. That menu, you cannot add to, or alter. It is a default menu.