效果很好，但加载有些慢可以试着在优化

unmaintained (Last updated May 14, 2018)

Thank you for creating a new Tree Style Tabs for newer versions of Firefox. However I have had to remove the add-on due to the colored tabs distracting and are leave text unreadable causing difficulty locating what tabs I am looking for. Can also be troublesome if looking for a tab buy color hue shade if colorblind.

I hope that some day there will be a toggle option to return to grey scale tabs fro those who need it.

Best wishes in your continued clever endeavors.

Style:
#sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] #sidebar-header {
display: none;
}
does not work for your addon.

In "original" Tree Style Tab - works.

P.S.
only this css works:

#sidebar-header {
display: none;
}

Seems this fork stops updating, Tree Style Tab have many new releases, but this fork still use very old version with bugs and performance issues. So I re-implement colored tabs function using TST API (instead of fork) in separate light extension https://addons.mozilla.org/firefox/addon/tst-colored-tabs/

That's what I'm looking for.

Good!
But can we have color by group tabs like in Tab Kit? Instead of random color for each individual tab?
Thanks! :)