Using Windows 8.1 and Thunderbird 52. Hyperlinks I receive in e-mails no longer work. I click and nothing happens. I have tried all the solutions listed here. HTTP and HTTPS are not listed at all at Tools> Options> Attachments UPDATE: Solution: The problem of hyperlinks not working in Thunderbird is almost always traced to corrupted places.sqlite, places.sqlite-shm, and places.sqlite-wal files. The solution is to delete those files. Close Thunderbird Find the Thunderbird installation folder. Delete places.* Run Thunderbird again. Problem should be fixed.