When I click a hyperlink in an eMail, nothing happend. It appears that it wants to go, but nothing gets to the browser. I'm using Thunderbird 38.0.1 (default eMail client) and Firefox 38.0.5 (default browser) on Windows 8.1. It worked great until my last Thunderbird upgrade. I did a second install, and it still doesn't work. What can I do to correct this?