It's a linux one Ethel (I've Tried to help on this one already)
don't think it's a firewall problem.. all the parts on the facebook page use port80 so if part of it is working it should all work. (also I don't think the one comes with a firewall installed as standard)
It may need the flash plugin for some to work. but that should install automatically. (out of interest do youtube videos work?)
Hau... try this link...
http://get.adobe.com/flashplayer/?promoid=DXLU J
Select YUM from the drop down menu and then select agree and install... if it give you a choice to open with a package manager then select that and it should install the flash plugin
the main issue is the live updates are not working, everything I could see seemed to point to the update service being unreliable and most people seem to say that all that can be done is just keep trying until it works!