If you been using it , it for a while with no problem but have recently experience problem may i asked did you update firefox browser recently because it seem on occasion the new firefox version 3.5.2 has some sort problem loading episodes. it does load however you might need to retry few times. This why you should disable auto-update on firefox. i notice keep old version (3.0) and you had no problems might i suggest re-install the old version and try again on free shows. i hope that should sort out the problems.
please check what version you are running
Secondly you are not suppose to download any episode you see on here-this is streaming website host episode not meant as download