When I want to connect to the server from my desktop I get the message that Firefox can't establish a connection at en-us.start3.mozilla.com. I tried uninstalling and reinstalling Firefox and the same thing happened. However, Firefox works from my laptop. After trying the suggestions, which didn't work, I decided to remove the program and then download it again. To my complete surprise the new program not only worked but it contained my bookmarks, etc. It's so nice to have Firefox back in use!