This package is now nine months out-of-date. When might we expect a version that actually works with current versions of Firefox?
https://addons.mozilla.org/en-US/firefox/addon/tree-style-tab/versions/2.0 Even the firefox-esr package will soon require a newer version: https://packages.debian.org/experimental/firefox-esr duplicate bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=889941