You say The current behaviour is trying to be close to single source pane behaviour of old browsers.
I think that's a bit of the problem. For me, nautilus is a single source pane browser and it looks like a single source pane browser. Calypso looks like something else - it looks like a typical tabbed editor. So it's behaviour does not march its look. That's what's confusing. I don't know what is the best behaviour for the tabs - but I think I would prefer always manually opening/closing tabs rather than the auto tabs behaviour - that way I would feel more in control. Other people's mileage may vary. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html