Material Dark for Firefox by Polumat

Material Dark for Firefox brings a clean, understated dark aesthetic inspired by Material Design principles — the same visual language behind Google's dark UI style.
This theme focuses on a muted charcoal-grey palette applied consistently across the browser:

Toolbar and tab bar in deep charcoal grey
Selected tab clearly distinguished from background tabs
Dark address bar with a soft blue focus highlight
Matching dark sidebar and popup menus

No bold colors, no distracting gradients — just a calm, low-contrast dark interface that's easy on the eyes during long browsing sessions.
Note: Firefox's right-click context menus follow your system theme and aren't affected by this add-on, as Firefox doesn't currently expose that UI to browser themes.
Feedback and suggestions are welcome!