This is quickly driving me to murder someone!

I click a link to a site; sometimes it actually loads, then I get similar to shown below;

or, it does not even load, I just get this: (one per alleged page load)

Please help!

John

"File not found

Firefox can't find the file at jar:file:///C:/Program Files/Mozilla Firefox/omni.ja!/chrome/browser/content/browser/undefinedf1409.mail.yahoo.comws/mail/v1/formrpc?appid=YahooMailClassic&wssid=PMTO.Wv9L7h&m=BatchExecute.




Firefox can't find the file at jar:file:///C:/Program Files/Mozilla Firefox/omni.ja!/chrome/browser/content/browser/undefinedwww.mozilla.orgen-US/firefox/.



Server not found

Firefox can't find the server at www.mozilla.org.

Check the address for typing errors such as
ww.example.com instead of
www.example.com
If you are unable to load any pages, check your computer's network
connection.
If your computer or network is protected by a firewall or proxy, make sure
that Firefox is permitted to access the Web.



File not found

Firefox can't find the file at jar:file:///C:/Program Files/Mozilla Firefox/omni.ja!/chrome/browser/content/browser/undefinedwww.askmehelpdesk.comfirefox/.

Before you hurt someone, try running Firefox in safe mode.
Instructions here (https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode).

Good luck,
WallyH