Proton ReDone - Hybrid by Tinhoso

This theme uses the official Proton Light and Proton Dark color palettes to create a modernized Photon design (Firefox versions 57 to 88) look and feel.

Like Photon design, this theme is much less bland than the official Proton themes: UI elements are perfectly distinguishable, the search bar pops out much more, the active tab is immediately recognizable.

Pop-up menus and sidebar are white, while context menus are dark (same color as the inactive tabs).