Rather not have upscaled stuff for a heap of reasons.
If you're having a hi-res screen like some of my comps, you can just use the standard "zoom" feature you can find in most browsers..
That's what I do on those comps, pages like that are ridiculously tiny on a 4k screen but probably of a decent size on older screens below 1080p.
(Hold ctrl and use scrollwheel is default for it in google chrome for example.)