The Productivity Portfolio blog runs down three common fixes for the unexpected and highly frustrating bug of hyperlinks going non-helpful—meaning your browser doesn’t open, goes to a dead page, or some other problem. The post notes that resetting your browser, re-registering DLL files, and resetting file-type handlers in Windows usually fixes the problem without a re-install, and runs down the steps to do so. The fixes mostly involve working with Internet Explorer, but, as pointed out, you can then just switch your default browser back to Firefox (phew!). .