Mobile browsers attempt to make content more prominent than navigation. This matters a lot on e.g. mobile news sites. Unfortunately the algorithm they use bre

Mobile browsers attempt to make content more prominent than navigation. This matters a lot on e.g. mobile news sites. Unfortunately the algorithm they use breaks horribly on comment threads, because it decides that long comments are content, while short comments are not important. (At least, this is my deduction from seeing it in action.) You'll see it on reddit, forum threads, and here on HN -- so this is not exactly a layout bug, but a problem with how Firefox/Chrome try to apply some simple semantics to web content.