1. A computer-implemented method for executing an operating system (OS) level command to install a new software application or install an updated software application on a user device, the method comprising: executing a web application in a web browser on the user device; generating a browser cookie comprising one or more instructions to invoke at least one OS-level command to install a new software application or install an updated software application on the user device, the browser cookie being generated by the web browser in response to executing the web application; detecting the browser cookie using a processor of the user device; storing the browser cookie on the user device; analyzing the browser cookie with the processor of the user device to identify at least one of the one or more instructions; validating the at least one of the one or more instructions by parsing the browser cookie to confirm that the one or more instructions conform to a proprietary syntax; executing the identified at least one of the one or more instructions using the processor of the user device to invoke the at least one OS-level command based on the one or more instructions from the browser cookie to install the new software application or install the updated software application on the user device; and modifying the browser cookie stored on the user device using the processor of the user device based on an execution of the at least one of the one or more instructions of the browser cookie in order to store status information regarding the attempt to install the new software application or install the updated software application.