Φόρουμ υποστήριξης - Firefox

I recently installed firefox on a new computer and it will not access the internet. Any access request gets the message "Hmmm. We're having trouble finding that site." We cannot connect to the server.... It says to check that fiefox has permission to access the web, but I do not know how to do that. How can I get Firefox to access the web? I do not want to have to use different browser, but will switch unless this is resolved.

I am unable to login to any website using the "Sign in with Apple ID" option when offered. The login window opens normally, the username and password fields render properly, but then as soon as I hit enter or click login. The confirmation/page with the two buttons one grey one blue that says "continue" appears for a split second and then vanishes. I have turned of all forms of content blocking and the issue still persists.

I closed all my tabs and reopened the browser bc I was getting lag on sites like X.com when typing my messages. Immediately after opening Firefox again, my homepage, MSN.com was loaded. I tried to click on the arrow to scroll through the different headline stories and nothing happened. I used Chrome & Opera to load the same page and they work fine. This seems like a Firefox thing. I have no extensions or permissions that deny me the right to click on anything. What is the problem?

I use Mozilla as my browser on Windows 7. When I click on Mozilla I get an Error page which reads, " Server Error in "/" Application. Runtime Error. Not sure how to fix this. Can you help. Thank-you