Sorry for the confusion. The problem isn't from JFBConnect, it's from your Fan Page in general. When I try to go directly to the page, below, it won't load for me. Instead, I'm brought to my Facebook Home page:
www.facebook.com/pages/Rochester-Agricul...ety/1474891936062316
That's usually a sign that the Page isn't public yet or has some sort of content restrictions (age, geography, etc) set on it. It's likely working in Firefox because you are logged into Facebook with an account that meets those restrictions (or are logged in as the admin of the FB Page). Until you lift those restrictions so you can visit the Page directly *without being logged into Facebook.com first*, you won't be able to promote it on your site.. because those restrictions will apply to all users that aren't logged into Facebook.
I hope that helps explain and get you going, but if not, or should you need any more help, just let me know!
Thanks,
Alex