Verovatno nisi dao sve potrebne dozvole. Vidi da li je poslednja verzija chroma, pa restartuj telefon. Ako to ne pomogne, probaj ovo:
You need to configure "Draw over other apps" settings to match your preferences. Search the quoted term for your make or model if the following path fails:
Settings\"Application Manager"\"Special access"\"Draw over other apps"
Posle toga trebala bi da ti se pojavi precica u meniju pretrazivaca-add to home screen.