Does this or something similar exist as a browser plugin? I suck at visual things, and it mostly looks dumb because I don't have an intuition about these things

Does this or something similar exist as a browser plugin? I suck at visual things, and it mostly looks dumb because I don't have an intuition about these things. I could go over a list like this and apply every tip to each element of what I might be working on but that's annoying. Font-size vs line-height, element alignment, button contrast and padding etc feel like things that could be automated -- even if it just ends in "hey, I drew a bunch of lines over your page, maybe you find something that looks like it could be moved to one of them". Does that exist?