Thanks for using my extension! I appreciate and have considered your suggestion, but I won't add it.

This feature would essentially only remove the step of opening a new tab of the selected page. Since this only takes two mouse clicks (click URL bar to select it, drag selection to tab area) I don't think it adds much value on its own.
I considered the possibility to clone a tab including its state, meaning for example keeping text input in fields, but I've looked into it and it isn't possible.