For me, on Linux Mint Cinnamon, you never know what's going to happen when you click on a mail in the list. For the same single click the message could open in the viewing pane (which is what I want) OR it could also open up in a new tab. It's VERY frustrating. Particularly if you're trying to select a set of emails to move. Sometimes when you click the last one the whole lot open up, then it takes forever to close each tab individually. It needs sorting out. Something like a single click to view or select, and a double click to open in a tab. Where can I suggest this to the creators of Thunderbird? I don't see a proper issue reporting system
