I have read through all of the responses to this exact questions posed by other users and nothing is working. What is the most frustrating is that this is not a constant issue. One minute I will be logged onto Facebook and when I try to visit a friends page or post something it will freeze, then the "untrusted connection" comes up. Or it will be working fine for a couple hours and I will log off of Facebook, when I come back a few hours later, or even a few minutes later I get the "untrusted connection" warning again. This has happened more now that Firefox has been updated and it is also happening to my roommate. She will be logged onto Facebook and I will try and get the warning, or vice versa. We are in the same room on separate computers. This problem does not occur on Google Chrome or Internet Explorer. This is an issue with Firefox, not my computers. We have four computers (2 Desktops, 2 Laptops) in our home, my boyfriend works in IT. We have done everything suggested by the people here and nothing works. I would understand if it was happening to one computer constantly and you tried to tell me it was my computer, but that is not the case. This happens with all four computers at different times. How can one person be logged on to Facebook and another isn't, then an hour later it will work on the latter computer and not the one it was working on previously. This is very frustrating. I love using Firefox over Internet Explorer and Google Chrome, I trust it more. But this is getting ridiculous. It has been happening for a long time, it just got worse with the update. Please help. It happens with Google and other popular sites as well.