Interesting: on my Mac laptop running Firefox (11.0), physically clicking the trackpad works, but a single tap (my usual) does nothing. A double tap does work,

Interesting: on my Mac laptop running Firefox (11.0), physically clicking the trackpad works, but a single tap (my usual) does nothing. A double tap does work, but it selects the first word in the menu as well. It's a cute demo, but as it stands I wouldn't want to use it for anything serious.