Vlad Thus, if you have Webapp1 open and click Webapp2, Webapp2 opens above Webapp1. I guess this will be the UX as the Webapps are not synced.
If this is the case, this would be another reason why I would prefer to move the windows not to overlap in first place.
Also, if you would add the a shortcut feature I would see an advantage in Webapps having moveable windows as they feel less menubar app like in this case anyway.