All of a sudden I am unable to open a url from a Thunderbird message or a secondary one when I am on a site. For example I have a message from a list that says 10 most read stories from xxxx . What used to happen is when I clicked on it I went to the site. I can get onto my frequently used sites but when I click on a link on that site I get nothing. In both cases there is a tab but it stays blank. Nothing happens.'''bold text'''