Comment 69 for bug 849624

I just had a first look at the new layout - it seems to be very unfinished yet; not only regarding Lightning.

I would suggest to give the same experience via commandline, as it is with the mode switching buttons!

But it does indeed open further possibilities:
What to do if someone issues TB with commandline "-mail -calendar -task" ?

I would assume he wants 1 window (or tab) for each mode: Mail, Calendar AND Task.

BTW: The tabbed window gives good abilities to introduce Task mode in Sunbird ;-)