Page History

...

•  Bookmarks, Bookmark folders, separators can be deleted using the Remove a bookmark button.
  
  
•  Bookmarks that have been removed do not come back after restarting an IGB session/

...

•  A bookmark's URL can be copied using Copy Bookmark as URL (found in the Bookmarks menu).
  
  
  •  Observation: The bookmark's URL can be pasted into a web browser and the web browser navigates to the bookmark in IGB.
    
    

...