"More photos and videos" is a Chrome extension developed by dlux.hu. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools extension. This free extension adds two buttons, "More photos" and "More videos," to Facebook profiles, making it easier to discover photos and videos related to a person.

The first feature, "More photos," allows users to explore additional photos of any Facebook user. It displays more photos in which the user has been tagged, even if the "Photos of the user" link is not visible. This feature is particularly useful as it often uncovers more photos than the default option.

Similarly, the second feature, "More videos," enables users to discover more videos of any Facebook user. It functions in a similar manner to the "More photos" feature, expanding the range of videos available for exploration.

Lastly, the extension includes a feature called "Copy canonical profile id." This feature copies the canonical profile link, including the profile_id, to the clipboard. This allows users to save the profile id of a person, even if they change their name or profile URL.

Overall, "More photos and videos" is a valuable extension for Facebook users who want to expand their photo and video browsing capabilities and easily save profile ids for future reference.