1. go to about:config 2. search for: widget.non-native-theme.scrollbar.size.over...

		that on Dec 6, 2022 \| parent \| context \| favorite \| on: We’re making Firefox accessible and delightful for... 1. go to about:config 2. search for: widget.non-native-theme.scrollbar.size.override 3. set the value from 0 to however many css pixels wide you want the scrollbar

Accessible and delightful indeed. /s