Does anyone know what happened to that new tab groups feature? It allowed you to be logged into a site with different users in different tabs. I was just getting to trying it out when it disappeared.
I don't know about the Beta or Dev editions, but in Nightly I can use tab groups by clicking and holding the "Open a new Tab" button and selecting the tab group. (Personal, Work, Banking, Shopping are predefined and you can add new ones)
