To get cool translucency, dimming of inactive windows++ on any window manager, including Firefox and i3, I use:
compton -bcCGf -i 0.8 -e 0.8 --no-fading-openclose --sw-opti
AltStyle γ«γγ£γ¦ε€ζγγγγγΌγΈ (->γͺγͺγΈγγ«) / γ’γγ¬γΉ: γ’γΌγ: γγγ©γ«γ ι³ε£°γγ©γ¦γΆ γ«γδ»γ ι θ²εθ»’ ζεζ‘ε€§ γ’γγ€γ«