As a perfectionist, it really annoys me sometime that a good half of the browser’s UI follows Google’s material design guidelines, but the other half doesn’t. It just doesn’t feel like it fits together very well. So you have two options: scrap material design or go all in on material design.
Can you see what I mean? This is literally material and not material in the same page:
And half the toggles in the browser are material and half aren’t: