As far as I know TreeStyleTab will still not be compatiable and it getting resistance on enabling the API needed to make it work like it does today. It will en

As far as I know TreeStyleTab will still not be compatiable and it getting resistance on enabling the API needed to make it work like it does today. It will end up being a far cry from what we have today and more like the Ridiclous and unusable "SideTree" menus that are available in chrome. No TreeStyle Tabs, no FF for me. that is non-optional. I will switch full time to vivalidi that has a less feature complete vertical tabs built in. There are also many other Addons I use today that look like their are going to be discontinued post FF 57 for API or other reasons.