At that point how are they different from bookmarks? I suppose with tab tree every page is ‘bookmarked’ until you close it, or bookmark it for real. Personally

At that point how are they different from bookmarks? I suppose with tab tree every page is ‘bookmarked’ until you close it, or bookmark it for real. Personally I save anything I actually want to refer back to as a PDF since the bookmarked web page will probably disappear.