pressmove event doesnt distinguish mouse button number in firefox

[ncfromdc]

We have an app that runs on Firefox and Chrome. In Firefox, he pressmove event event is firing ok, but the button number (0,1,2) is always 0 for a pressmove. It is correct for mousedown, mouseup etc. This occurs all the way up to firefox 39.0

My solution is to capture the button used on the mousedown and when the pressmove is fired i look at the button number captured during the mousedown.

However in chrome, pressmove event DOES return the proper button number. In Firefox it doesnt.

Is this a firefox bug or something that can be corrected in Easel. Thanks!

[Harbs]

Out of curiosity, I just tried this, and I seem to get get the correct button in the nativeEvent (i.e. 2) in Firefox on Mac.