Abstract: A request to mask an object in a transmitted media stream of a communication session is received. For example, a request to mask a portion of an image, such as a license plate in an image of an automobile is received from a user via a toolbar. A determination is made that a media stream with the object is going to be transmitted in the communication session. For example, the image object is going to be transmitted in a co-browsing session. The object is masked from the media stream of the communication session. The media stream with the masked object is then transmitted in the communication session. The masking prevents the other users in the communication session from seeing the masked object. In one embodiment, the user may select individual users in the communication session that will receive the masked object.