No one mentioned WebP support yet! This is great news, Firefox will now feel faster on all the sites that use WebP. Safari is the last major browser to hold out.
What's so great about webp? I haven't heard about it. Is it one of those jpeg competitors? Because I did see a blog post recently that said none of the the things people are coming up with are more than marginally better despite jpeg's age.
However, WebP works well for a much larger range of image types[0]. It has lossless options with better compression than PNG (because PNG is incredibly simple compared to more recent image formats, in my opinion in a kind of beautiful way). And when compressing graphically simple illustrations with lossy settings, it can get much better results than JPG, both compression and quality wise.
Having said that, I still hope FLIF (or some descendant of it) will get some traction eventually[1].
