The Page Shot service is run by Mozilla. It provides a download button so you can get a local copy of the image, but you might as well use the OS screenshot if

The Page Shot service is run by Mozilla. It provides a download button so you can get a local copy of the image, but you might as well use the OS screenshot if you just want a local copy. Shots are designed to be easily shareable which is why they go on a hosted service. It is easy to run the open source backend yourself if that is what you would prefer. (I work on Page Shot)