It would be nice if the "You are about co close tabs" dialogue also offered the option to close just the current tab. I think it would require less fiddly mouse control than the current method.
Hmm. Interesting idea. I'm not sure we'll implement it in the current experiment, but would you mind suggesting it in this issue tracker so that someone might implement it later? Thanks!
I have 3 ideas for the close-button in the Tab Center bar: