There's also talk of implementing Tree Style Tabs as a WebExtension. It appears the required APIs have been approved, they're just waiting on someone to impleme

There's also talk of implementing Tree Style Tabs as a WebExtension. It appears the required APIs have been approved, they're just waiting on someone to implement them: https://github.com/piroor/treestyletab/issues/1224 https://github.com/piroor/treestyletab/issues/1224