4nicholas said

So for example I clicked on the Firefox help icon and it said 'server not found' I shut it down clicked on it again and it opened

What do you mean shut it down ? Did you close Firefox, or that window.

Load the page. After, hold down the Shift key and press Reload.

http://www.ehow.com/how_11385212_troubleshoot-reset-connection-firefox.html

https://support.mozilla.org/en-US/kb/server-not-found-connection-problem

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

I mean I close a window, reload and it works (usually) At times I'm also getting some of the words 'Server not found' in the middle of a page that I have opened. Or to either side of that page's information.

It could be a connection problem, or something interfering with your connection (such as limited connection speed, too much traffic, ad-ware, limited resources, add-ons, or firewall configuration. is the problem only with firefox (other browsers or other programs that use the internet) ? are you connecting through wifi? do you have enough system resources? Try resetting your router. run antivirus and anti malware.