Arrgh. I wish shortcuts like this were more discoverable. Shift+right click seems useful and I'll probably end up using it sometime in the future, but I would have never known about it if it were not for this comment. Same as ctrl-L, and for 99% of people F5 and alt+left/right. There should be a page listed in the Firefox menu with a list of useful shortcuts, from most useful (F5, alt+left/right) at the top (so that normal people can get some efficiency gains easily) and going to to more obscure ones like shift+right click so that power users like us can... well, be power users.