As most modern web browsers do, there is a tiny cross in each tab, so that closing does not require a right-click or a key press.
Thanks for feedback.
You can also close tabs with middle click too, but yes as an option would be good to have a close button.
We actually have this implemented already, we only need to add the option.
This is how it looks:
Ok fine. Why as an option? It is not disturbing.
Good for the middle button tip.