Being able to close the tabs by middle clicking on them would make them feel more like Firefox tabs. It's pretty common to try it and wonder why they don't close themselves. Old habits die hard.
I agree, it's the only way I close tabs in Firefox or Chrome. It shouldn't be too hard, so we'll see based on priority.
The way to do it seems to be to add a listener for mousedown to attachTabs in PackageController.js and then call tab.destroy(). But do we have access to event.button there?
got it working on -dev https://github.com/mozilla/FlightDeck/commit/e19dc9fe80a703a919411c11fd4beeb290ddfdc8
It works great. Thanks Sean!