When Tor is used in its original windowed state, it shows resolution of 1000x1000. That's to prevent from your real display resolution from being recorded because it can be used as an identifier for your machine. The problem is that Tor nodes are often detected these days and on many sites Tor cannot be used to login or view something, even if you force strict node geolocations. Chrome and Chromium-based browsers do not hide your screen resolution when you use them in fullscreen or windowed modes. Can that be mitigated in some way other than changing screen resolutions in control panel? What about browser versions and other identifiers?
There are various extensions for that. The most complete is Trace. It fakes screen resolution and many other things. An other interesting extention is FontFingerprinting Defender (for spoofing your fonts). But all these Chrome extensions have many limitations. Their faking methods are relatively easily detectable. There are more valuable extention for your purpose on FF, for example CanvasBlocker and Chameleon. These two have overlapping features. In that case, I think CanvasBlocker faking methods are better (and more fine grained and ajustable). NB: Recently, Brave's team began to implement faking features concerning canvas and audio, see last version of Brave nightly for that.