Social media links not showing

I'm using Firefox 30.0 as well.

Which social links have you added that are NOT showing, I see all the links you have added.

Do you have any addins installed in your FireFox? Try turning off all add-ins and then viewing your site.
Are you viewing from work where these sites might be blocked?

There are five links in total and the only one that's showing is Meetup. It could well be an add-in in Firefox that's blocking them if other users have no issue. I'm not overly concerned now that I know it's an issue with my browser because Internet Explorer displays them fine.