Attack, Hit/DC, and Damage buttons not working as intended

I was using Firefox browser in this instance. There are several problems on the 5e sheet as far as the buttons under the ACTIONS tab.

--Either R-clicking or L-clicking on the Attack button (with the weapon icon on it) rolls attack and damage at once with no option to use advantage or disadvantage.
--Trying to use Shift/Ctrl for advantage/disadvantage on the Attack button results in it rolling the 2d20, adding them together,  and then adding bonuses.
--R-clicking on the Hit/DC and Damage buttons does nothing (it no longer pulls up the drop-down window for choosing advantage/disadvantage).
--L-clicking the Hit/DC and Damage buttons only rolls once (no option for advantage/disadvantage).
--Also employing Shift/Ctrl for advantage/disadvantage on the Hit/DC and Damage buttons still only rolls once.

The end result of all this is that it is now impossible to roll advantage/disadvantage properly. We are stuck having to roll twice every time we need advantage or disadvantage and manually choosing the higher or lower roll.