All websites should be readable in Firefox or Safari (or Chrome but I don't use that) with the minimum font size set larger than the default. I use 18 min and a lot of stuff breaks. I'm sure that other people would greatly benefit from even larger fonts.
I don't care about "pretty". I'm resigned to not getting that. But a lot of text simply disappears when the minimum font size is bumped up.
At least Firefox manages to render most sites at a decent size when I set 18 min. Safari, for some reason, still struggles with that.
Also, I generally read everything using Lucida Grande. It's a nice legible font. Firefox allows me to force that font. Safari doesn't. Just how fucking hard would it be for Apple to let me choose my own font in Safari?