Discovered this by accident, similar to the old days of putting URL’S of favorite web sites in start up folder but even better. Most of us have several to many favorite sites we automatically open every day. Well if you make a folder and put it on the bookmarks bar, and then put all the favorite sites you visit every day inside that folder. Once that is finished do a command click on the folder and all your sites will open in their individual tabs automatically. Great time saver. Enjoy.