Is there a need to use uBlock for this sort of thing? In Firefox, there's a button to allow sites to use their own fonts, in the 'advanced' fonts menu. I don't see any reason why a website should pick it's own fonts.

I go back and forth on allowing it to set background and text colors. Forcing black text on a white background does make some pages pretty ugly, but it does force everything to be readable.

There isn't, except that it makes it possible to selectively enable them on certain sites. They don't bother me for things that I use regularly and already have them cached, like my bank. In fact, without them a lot of UI elements like carets and button icons become junk.

Yeah, the caret issue was a little weird to get used to, but I find it kind of funny now.