I use two windows. I split my screen vertically.
It would be nice if content reflowed to fit my borders, with a bit of whitespace.
Here's a screenshot. https://imgur.com/a/I0hnF
The more readable wikipedia requires horizontal scrolling. (But also note YouTube includes too much whitespace, making the video small. This is a recent, annoying, change that I haven't created a tampermonkey rule for yet.)