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→DOM mouse wheel events and Scrolling and other default action
Note that the transaction is updated only when a mouse wheel event scrolls the target frame actually. I.e., when a user keeps to turn mouse wheel to unscrollable direction, the transaction will be timed out. This is important for touchpad users, see [https://bugzilla.mozilla.org/show_bug.cgi?id=442774 bug 442774].
= DOM mouse wheel events and Scrolling and other default Default action =
The specification of DOM Level 3 Events defines "wheel" event. We're working on this in [https://bugzilla.mozilla.org/show_bug.cgi?id=719320 bug 719320]. All web developers should handle only this event after it's fixed.
