I agree. It is nice, at least, that the same keyboard shortcuts (with the control key) (or with the middle key of the mouse) works the same for bookmarks and links, so it's easier to remember. I think I like the control-left-click (or control-shift-left click) option better too. Good luck! Maybe that extension will be out there which gives you what you want (or it will come in the near future). As I say, I found a few with the purported feature, but when I tested them, they didn't work for me. Not sure why. Using the keyboard shortcut can be better, because there may be times you want to open a bookmark or link in the same tab.
By the way, did you know for searches in the Omni-Search (main address) bar, if you hold the alt key down and press enter, the search will open in a new tab too? If you didn't know that, it's a good one.