Nothing can beat Tree Style tab in Firefox. You can make "folders of tabs" and whole hierarchies. For "tabs collectors" like me who have 40 tabs always open thi

Nothing can beat Tree Style tab in Firefox. You can make "folders of tabs" and whole hierarchies. For "tabs collectors" like me who have 40 tabs always open this is a must. My current setup : I have 5 pinned tab on top of the tree. Below I have a "github" group of tabs. Below I have a set of tabs opened on different parts of an app I'm working on. Below is a group of documentation tabs. Below is another group of articles I plan to read at some point. Below I have the HN tab, with a tree of articles and comments. I can't imagine going back to horizontal tabs. This is just much too good.