[ucho]

Yeas, what about it? Oh right, it might stop working after Firefox 57: https://github.com/piroor/treestyletab/issues/1224 . There are people working on it but that isn't true for many other extensions that are no longer under active development.

[baby]

What is the point of using Chrome if you can't have something like Tree Style Tabs? Unless you're a beta user I don't see the point. I personally will stop using newer versions of Firefox if they stop supporting tabs on the side.