What happens when you try to load tFS? Do you get an error message? Please give as much detail as possible.
What OS and version are you using?
If Windows, do you have current antivirus and anti-malware software installed and operating? If so, please do a complete system scan, repairing any errors.
Please make sure you are using current versions of your browsers.
We will try to identify the problem. tFS is running fine on Chrome and Mozilla Firefox here so the problem is likely at your end.
after all, it was you and me