Described are systems and methods for screen sharing between host and agent computing systems. At a time before capturing the screen of the host computing system, each open window corresponding to a browser process is identified. Certain information is acquired about each browser process. It is determined, in response to the certain information acquired about each browser process, whether the open window corresponding to that browser process is eligible for screen capture. For each eligible open window, each visible portion of that eligible open window is captured. Capture of an image on the screen of the host computing system is limited to each visible portion of each eligible open window.