Thank you very much! Not really a perfect solution (you still have to make many clicks, I just use MiddleClick or Ctrl+LeftCLick to open a background tab normal

Thank you very much! Not really a perfect solution (you still have to make many clicks, I just use MiddleClick or Ctrl+LeftCLick to open a background tab normally) but a really great extension nevertheless. I'm very happy to discover it.