Geckoview is not a webview for those Platforms.

The Chromium sandbox is way better

https://madaidans-insecurities.github.io/firefox-chromium.html

Very secure profile. Your argument makes no sense, it would be opt in and Arkenfox works nearly everywhere.

Yeah I am not talking about opensearch but actual custom Search parameters. Fenix doesnt support opensearch too.

~~Oh nice extension, will try that!~~ no that is not a sidebar I would like

Addition: gui button for managing profiles, especially for secure and insecure profile. Most people dont even know profiles exist!

Also: unlocking profile with hardware key