Split-screen
Allow users to split the screen to display multiple trees at once. Users could then work with multiple parts of the tree at the same time and enjoy a smoother workflow.
Thumbnails in the info box
Show website thumbnails in the info box to identify tabs at a glance.
Reveal in tree
Add a button to reveal the current tab in the tree (to avoid having to look for it)
Annotations
Allow users to take notes right within TidyBee. This could be useful e.g. to remember why they needed to add a given bookmark.
Locks
Allow users to lock bookmarks that they want to keep to avoid deleting them accidentally.
Sessions
Allow users to create sessions to quickly restore the state of their workspace and get back to where they were. This would be helpful to easily restore open tabs etc. after first opening the browser, or to easily switch between different sessions (e.g. when the user wants to stop working on a project and resume working on another one).
Undo-redo and actions history
Allow users to undo and redo actions, e.g. to restore a bookmark deleted by mistake.
Mobile version
Create a version of the extension that works on smartphones too. Since extensions do not work on the mobile version of Google Chrome, the extension would need to run on alternative web browsers and sync user data between browsers.