<p>A wagering game system and its operations are described herein. In some embodiments, the operations can include coordinating presentation of media in a plurality of browsers of one or more wagering game machines. The operations can include subscribing a first browser and a second browser of a wagering game machine to a communication channel; presenting media for a wagering game in the first browser of the wagering game machine; requesting a result for the wagering game; presenting media for the wagering game result in the first browser; and determining that the wagering game result triggers a bonus game in the second browser. The operations can also include notifying the second browser of the wagering game machine of the bonus game trigger via the communication channel to cause the second browser to present media for the bonus game.</p>
