Are you talking about emulating that behavior as a user? In that case: not that I'm aware of. Touch devices use touch events, instead of pointer events. Mousover is one of those things you just can't do on mobile and have to account for when designing interfaces to be used on touch devices.

Dolphin Browser solved it this way. Instead off just clicking you move your finger just a few millimeters and it triggers mouse-over instead. Would love that on Firefox aswell.