ProtonPass от Arkamas

This theme uses color coding from Proton Pass to closely match for Firefox/Librewolf.
Custom home page URL for DuckDuckGo theme in Firefox/Librewolf. (May need to be copied/pasted.) This is mainly for the theme. You can change other settings as you prefer to modify the outputted URL.
https://duckduckgo.com/?kae=d&kdcm=3&kdcs=1&k7=181825&kj=1E1E31&k8=BEB8D8&kav=1&k1=-1&kv=1&kak=-1&kax=-1&kaq=-1&kap=-1&kao=-1&kau=-1&kw=w&k21=181825&kx=a4b5ff&k9=A4B5FF&kai=b&kf=1&kbh=1&kbi=1&k18=1&kaa=A4B5FF&ku=-1&ko=1&kz=-1
(Add "q=%s" at the end of the URL to add as a custom search engine in the browser.)