You can still do this in Waterfox, FYI.

I’ve not used Firefox in years (just various forks), specifically because of Mozilla’s insistence on changing the UI and not allowing you to change it back.

Wake up about 15 minutes before I have to be out the door. Just enough time to go to the loo, brush my teeth and chuck some clothes on.

If I give myself more time than I need, I just get sidetracked by something and end up making myself late.