There's no reason to believe that lurkers have substantially different behavior than commenters. More likely is that those who use firefox are more passionate and informed about browser issues.
Commenters are extreme outliers. Only a tiny single-digit percentage of forum readers online ever comment. HN is also a highly regarded, particularly alienating site with a strict tone expected from commenters. I'd imagine the ratio of lurkers to commenters is 100:1.
No it isn't you are incorrect. I now present my essay on why you are incorrect. Now we argue for hours on semantic differences and then call it a draw. And then dang shows up and gets mad that the comments aren't following the rules shown on that really, really ugly and vague faq guidelines page.
Wow this comment is getting downvoted a lot. I think I wasn't clear with what I meant. What I meant is that there's no reason to believe that lurkers have big difference in which browser they use.
Commenters by definition have substantially different behavior than lurkers: they comment.
Furthermore, people tend to be louder about things they perceive as threats, such as corporations dominating the internet. Those who comment about those threats are likely to be the same ones taking active steps to mitigate them.
