Provides WSContext, WSChatContext, WSPresenceContext, AvatarOverrideContext and WSEventsContext. It connects with the session's token, or anonymously, and reconnects with a backoff doubling up to 30 s. A new token (sign-in, sign-out, another account) clears the live state and reconnects. A new notification or chat message chimes, and the unread counts go in the tab title.