[sillyalbatross]

They finally fixed the spacing issue with the default San Francisco font, which was left completely broken and disgusting looking for over two years. But it still renders differently than Safari and Chrome, which you'll notice if you open a Github page for example and quickly flip between the two windows.

For whatever reason Firefox likes to make everything a little bolder and more spaced out, and on top of that doesn't seem to support the most widely used anti-aliasing CSS properties.

I resorted to injecting -moz-osx-font-smoothing in userContent.css on websites I visit frequently that look particularly bad.