Re:The New Firefox and Ridiculous Numbers of Tabs
by ZenoArrow on Sunday July 23, 2017 @04:37AM
(#14831414)
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://addons.mozilla.org/en-US/firefox/addon/tree-tabs/
not as nice as the old one (but it's improving!), I just use Tab Center Redux.