Oh, it's absolutely Microsoft's fault. In this case they are using (or at least were) pre-standard chrome specific apis. The problem isn't that Firefox is bad.

Oh, it's absolutely Microsoft's fault. In this case they are using (or at least were) pre-standard chrome specific apis. The problem isn't that Firefox is bad. It's that many site are designed specifically for chrome, and they don't bother testing against Firefox. And for the average user, all they really notice is thay some sites don't work in Firefox.