Do you see any GET messages appear (with or without an OK confirmation) when you open the Web Console (Web Developer > Web Console;Ctrl+Shift+K) and do a hard reload (Ctr+F5) indicating that Firefox at least tries to load those web pages?

• https://developer.mozilla.org/en/Tools/Web_Console
• https://developer.mozilla.org/en/Using_the_Web_Console

I got a message that looks like this :(

No one could help me? It sucks that I have to use to the outdated IE :( I remember the same problem happened when I had FF12, then was fixed after updating.

That screenshot shows pages retrieved from the cache AFAICT or something else is wrong because I only see a request for the main page and no requests for any subsequent data like images, CSS files ,and JavaScript files.

Did you try to do a hard reload or at least clear the cache to make Firefox reload the pages from the server?

• https://support.mozilla.org/kb/Clear+Recent+History

You can remove all stored data from a specific domain via "Forget About This Site" in the right-click context menu of an history entry (Show All History or History sidebar).

Using "Forget About This Site" will remove everything like bookmarks, cookies, passwords, cache, history, and exceptions from that domain, so be cautious and if you have a password or other data from that domain that you do not want to lose then make a note of those passwords and bookmarks. You can't recover from that "forget" unless you have a backup of the affected files.

It doesn't have any lasting effect, so if you revisit such a 'forgotten' website then data from that website will be saved once again.

Sorry for late reply.

Does "a hard reload" mean Ctrl+F5? It doesn't work either. I cleared the cache, then tried "Forget About This Site", but nothing changed :(