After someone in the Vivaldi community mentioned something about scroll bars... I didn't notice it until now and thought I would do some tinkering.
Given simple scrollbars seem to be for internal pages only. I thought, surely not. Now scrollbars for all pages look "better" :)
427622571-f2832ca9-6f37-4352-8a37-8f0d8f112f42.mp4
427622608-709ef6f7-3712-491b-957a-22509ecad746.mp4
Enjoy!