Comment by PufPufPuf

As a person that recently started using it: it has something like "tree style tabs", and sort of a hybrid merge of the concepts of tabs and bookmarks. In other words, the tabs work more like files on disk -- open/closed, sorted into folders. I'm probably not explaining it well either, but I encourage you to try it if you ever wanted to experiment with alternative tab management (tree style tab, tab groups etc). It's a concept that clicked for me quickly once I started using it, and now I'm angry since I want to use Firefox for philosophical reasons but don't want to go back to regular tabs.