Wow, really? That's the same setup as me, and right clicking works for me. Tres weird!
Well, I AM abusing the event calling, so I'm not surprised it fails.. but I wonder if it's a bug in my code, or in firefox. (Or perhaps in java?)
What version of firefox? I've got 184.108.40.206
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:220.127.116.11) Gecko/20071127 Firefox/18.104.22.168
i get it for all applets, (with all extensions disabled aswell).
EDIT: the applet gets the event btw, but the context menu pops up aswell.