1. One or more machine-readable storage media having instructions stored therein, wherein the instructions, when executed, cause a machine to: embed, in previously loaded web page source code, additional code which, when executed, causes the machine to load a plurality of web browser add-on containers, wherein each of the plurality of web browser add-on containers are associated with different technologies for presenting content via a web browser, wherein the additional code is embedded in accordance with the previously loaded web page source code; execute the additional code and load the plurality of web browser add-on containers in accordance with execution of the additional code; manage wagering game events received by an instance of the web browser; manage subscriptions to wagering game events by the plurality of web browser add-on containers; and communicate identifiers of wagering game events to the plurality of web browser add-on containers in accordance with the subscriptions.