This addon allows you to keep a bookmark folder in sync with the open tabs of a window. You can assign a window to track a bookmark group, and when new tabs are created or deleted, the bookmark group will be updated.
You can also a window from any bookmark folder and its contents will match the open tabs after you're done.
This is a tab group implementation that takes advantage of the built-in bookmark folder features to make tab groups more stable and allow exporting to a different browser if need be.
