Really? There are extensions for that sort of thing. Your extension list can even be synchronized across devices.
Tree Style Tab, for example, allows control over how new tabs are opened in relation to existing tabs if you don't like FF defaults. Even if you don't like the tree view, you get a UI that adds settings for how your tabs should open and stay grouped.
Tree Style Tab, for example, allows control over how new tabs are opened in relation to existing tabs if you don't like FF defaults. Even if you don't like the tree view, you get a UI that adds settings for how your tabs should open and stay grouped.