Aesthetic Problems

[AbhijitSipahimalani]

The open, close minimize buttons don't line up in color with the rest of the bar.

Steps to reproduce the behavior:
Install Flying Fox and the TreeStyleTabs

Firefox Version
Firefox Nightly 89.0a1

[Akshat Sharma]

Yes thats a known issue with 89. A temporary fix for window-controls background color as showed in #60

toolbox#navigator-toolbox {
  border-bottom: solid var(--dividers) var(--sidebar-shadow-color) !important;
  background-color: var(--toolbar-bgcolor) !important;
}

Closing duplicate.