Blue Post Marker is a free Chrome extension developed by developer.waieight. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This extension is designed to enhance the user experience on Bluesky by allowing users to easily track new posts.

With Blue Post Marker, users can bookmark the Bluesky home screen and have new posts marked for easy viewing. This eliminates the need to manually scroll through the feed to find the latest updates. The extension automatically updates the bookmarked home screen, list, and search to display new posts.

It's worth noting that the time zone for new posts changes each time the bookmarked Bluesky home screen, list, or search is closed. This ensures that users always have the most up-to-date information at their fingertips. However, it's important to be aware that changes in the specifications of Bluesky may affect the functionality of the extension.

Overall, Blue Post Marker is a handy tool for Bluesky users who want to stay on top of new posts without the hassle of manual searching. It's easy to use and provides a convenient way to track updates on the platform.