Abstract: A system for adding an external function to a webpage includes: one or more processors; and memory communicably connected to the one or more processors and storing instructions that, when executed by the one or more processors, cause the one or more processors to: receive code associated with the webpage from a remote server; identify a plurality of images in the code; filter the plurality of images to identify a first type of image different from other images of the plurality of images; and append the external function to the first type of image to display a modified webpage including the external function on a display device of a first user.