Hyperlinks in Thunderbird (115.9.0 64 bit) running on Ubuntu 22.04.4-LTS have quit working overnight. Too my knowledge nothing changed. I have followed all the steps in the document "Hyperlinks in messages not working" with no luck. 1) My default browser was Chrome. Changed to FireFox. No Luck. Changed back no luck. 2) Check that no application is specified for HTTP content can not be followed No Preferences option exists under the menu in my version of Thunderbird. Checked in settings found nothing matching the description. 3) Checked for incorrect preferences. Used config editor. Their is no Reset option for the settings. Found the referenced setting. Switched from True to False and then back again, hoping the might reset it. No Luck 4) Switched to Safe mode from the Help menu. No luck. New to Linux, just set this system up 2 months ago. Migrated my Windows Thunderbird database without issue and it was working fine until this morning. In need of suggestions. If uninstalling is going to be required, I need to be able to do it a way that does not lose my historical email records or my cardbook address book of 1000 names. Thanks