Imgur - Seent It is a free Chrome extension developed by HHHApps. This extension adds a 'Seent It' icon to previously viewed Imgur gallery posts, fulfilling a long-awaited feature requested by Imgur users.

When you use this extension and visit imgur.com, it will automatically add the gallery post's ID to local storage as you browse through the gallery. The extension then marks these posts as "Seent" or viewed. This marking is visible in both the gallery list and the sidebar of individual gallery posts.

It's important to note that this extension currently does not handle reposts, although there may be plans for future development to include this feature. The developer aims to keep the app up-to-date and plans to add new features over time.

Due to potential limitations of local storage, the developer is considering multiple options to handle marking images as "Seent" based on user feedback. These options may include reading from History and offering alternative ways to store viewed gallery posts.

For more information, you can view the code on GitHub at [GitHub link 1] or [GitHub link 2]. If you have any questions or feedback, you can contact the developer on imgur.com at [developer's imgur profile link].