Web content layout engine instance sharing is provided by configuring a shared instance of a web browser layout engine shared between a first mobile device and a second mobile device; dynamically partitioning requested web content for display across the first mobile device and the second mobile device using the shared instance of the web browser layout engine, where the dynamically partitioning selects first interface element(s) of the web content for display by the first mobile device and selects second interface element(s) of the web content for display by the second mobile device, and where at least one second interface element of the second interface element(s) includes an action interface element, interaction with which is configured to advance a workflow of which the web content is a part; determining, based at least in part on user input, whether to advance the workflow; and performing processing based on the determining.