Systems and methods are disclosed for initiating operating system commands based on browser cookies. In one implementation, a processing device detects a browser cookie that includes one or more instructions to invoke at least one operating system (OS) level command. The processing device analyzes the browser cookie to identify at least one of the one or more instructions. The processing device executes the identified at least one of the one or more instructions. The processing device modifies the browser cookie based on an execution of the at least one of the one or more instructions.