Several website, some regularly visited, some new will not load on my MacBook Air instead give an error message

   Check to make sure you’ve typed the website address correctly and try again in a few moments.
   Check your network connection.
   Check that Firefox has permission to access the web (you might be connected but behind a firewall).

   Check to make sure you’ve typed the website address correctly and try again in a few moments.
   Check your network connection.
   Check that Firefox has permission to access the web (you might be connected but behind a firewall).

Several website, some regularly visited, some new, will not load on my MacBook Air Instead give an error message regular visitor Server Not Found Firefox can’t connect to the server at login.growtherapy.com. What can you do about it? Check to make sure you’ve typed the website address correctly and try again in a few moments. Check your network connection. Check that Firefox has permission to access the web (you might be connected but behind a firewall). // new Server Not Found Firefox can’t connect to the server at upway.co. What can you do about it? Check to make sure you’ve typed the website address correctly and try again in a few moments. Check your network connection. Check that Firefox has permission to access the web (you might be connected but behind a firewall). // I can still access some sites on my phone, where I use Safari