7. The computer program product of claim 6 , wherein the file identifier comprises a checksum of the image file.
6. The computer program product of claim 1 , wherein the program code is further configured to cause the computer to: detect a displayed image during the application session; identify an image file associated with the displayed image; generate a file identifier associated with the image file; send the file identifier to the replay system; and send the image file associated with the file identifier to the replay system in response to a message indicating the image file is not stored on the replay system.