Jul 1, 2021 - MANY BUGS:
- frequently crashes and "restarts" add-on and sidebar... I tend to have 500+ tabs open (currently 1600+)

- for some reason sometimes tab tree opens into a new window when I am simply clicking tabs in sidebar.... and I DO NOT even have the "Tree Style Tab in Separate Window" option added

Enhancements needed:
- need to improve the highlighting of which tab is the current active tab.... something like a black border... including when using with Colored Tabs

- need a command to be able to separate 1st tab from tree... instead you have to move all the other sub-tabs

Nov 28, 2019 - please add search function/filter to tabs - I see this was just added as of Jun 2021 - YAY! (looks like still beta version though but nice move!)

Aug 9, 2019 - Please add keyboard shortcut for Mac, preferably one-handed, e.g. OPT-1