One star off for a single critical missing feature. Need to add the ability to switch Google accounts within the sidebar. As is it only connects with the default account so if users need to use it with any other account there is no way to switch in this extension without first logging out of every account, and logging into whichever account you want to use for Chat first in order to make that account default. There are many applications where a user may need to use Chat with a different account that is not default. Fix this and I'll give it five stars.