Works as expected, only thing I would like to see as mentioned in other reviews, is the option that pages do not have to reload until clicked, or that they are cached and don't have to reload.

This is what I wanted but it will great if you change the behavior to open only activated tab instead of reopen all when users select a group.

If I move a tab between two windows, the tab didn't auto add in group, until I press create a new tab(ctrl+T).