Bookmark Session is a Chrome add-on developed by dgravesdev that allows users to easily save and organize their open tabs into bookmarks. With a single click of the "Bookmark Current Session" button, users can create a bookmark folder called "past sessions" and have their open tabs saved in a structured manner.

The main purpose of Bookmark Session is to help users declutter their browser by saving all their open tabs and starting a fresh session. This add-on ensures that no important tabs are lost when closing the browser. By organizing bookmarks into directories based on year, day, and window, users can easily find and access their saved sessions.

The structure of the "past sessions" directory is intuitive and easy to navigate. Each session is categorized by year, and within each year, sessions are further divided by date. Each session contains windows, and each window contains bookmarks for the associated open tabs.

Bookmark Session is a free add-on that provides a convenient solution for managing and saving browser tabs. It offers a straightforward way to keep track of important tabs and maintain a clutter-free browsing experience.