Yes, I did try it. I get there every time and I’m using Firefox as well. All I did was copy and paste page source. I checked it both in preview mode and after I posted it. It works fine.
Check your tabs in Firefox, sometimes when I think they have taken me back to my original page, I find I am just in the wrong tab.
Hmm... here's what I see in the page source for that link:
<a href="posts?page=58#58">58</a> |