If a photo was previously public and later made private, search engines or the Internet Archive might have cached a thumbnail. This only works for photos that existed publicly in the past. Note: This is not "bypassing privacy"; it is viewing historical public data.
The script shows a popup saying “Processing… Please share to continue” or “Download this extension to unlock.” It never shows photos. It is designed to trick you into sharing your login credentials or completing surveys. vedere foto private facebook greasemonkey
You might find a script named “Facebook Private Photo Viewer” with code that looks legitimate. In reality, these scripts often: If a photo was previously public and later