It’s not better with the Butterfly it seems. Update: it’s a Firefox thing, stop sending this in :-] Msn.com updated to filter mouse click events such that right-clicking functionality is only provided by IE. Firefox user’s attempt to open links in another tab find themselves SOL as a right click attempt simply behaves as a left click thereby proceeding to the Msn site in the current window. This is completely uncalled for. To fix this- go to msn.com, open adblock, block the script http://hp.msn.com/scr/home/msnmoz1021.js, problem solved. Link.
HOW TO stop FireFox bug- right click opppression