Similar problem here. My resolution is 1440x900 (27in Monitor) paired w/ 1280x720 (32in TV) and I keep 3 Browsers Open (Edge, Opera, FireFox - each has intent). Each are at 3/4 width and 1/2 height and offset so I can see each partially.

With this setup, many sites work, but a few... a few have a top ad banner, a side banner and a footer of 'cookie acceptance'... then add in a 'subscribe to our email' and a google login prompt.... (Game Wiki's.. I game in smaller windows too -- what good is a multi tasking computer if you don't use it?)