A method for browser-based chat messaging is provided. The method presents browser-based presentation interfaces, including a master and at least one slave, and including a chat messaging interface for the master; establishes a single communication session with a server system, by the master; receives chat data, by the chat messaging interface of the master via the single communication session, including rich content comprising graphical elements, enhanced formatting, and interactive functionality; stores the chat data including the rich content in session storage for the master; renders the chat data including the rich content, by the chat messaging interface of the master; provides updated chat data including the rich content to the slaves, by the master via a broadcast pipeline for the browser application; and presents the updated chat data by re-rendering the chat data including the rich content, via secondary chat messaging interfaces corresponding to the slaves.