On Mozilla Firefox ..I can't get the photos when I click on them on Facebook.?

I only get a white page with the comments...no photo (which is usually enlarged after you click on it on the News Feed). It also happens on photo pages of mine and Friends. This has been happening for months. I have to use Flock to be able to see them. (There is another reason why I can't only use Flock... Flock won't show all my rooms on Yoville or all my farm on Farmville) So far no one has been able to tell me how to fix either one.)