Reply To: userChrome.css Tweaks for ColorfulTabs in Firefox Quantum and later

[FluxApex]

Thanks for this. Glad I can use Color Tabs and still theme FF. Instead of 'initial' I have just used contrasting colors for 'background' and 'color'. I'm not that big a fan of 'Metro' colors in the newer apps, but contrasting metro colors would work well here.
What I'm using atm:

toolbar {
  background: #263238 !important;
  color: #ECEFF1 !important;
}