> lets you fully erase your browser history for any website

I just want a button to whitelist a domain and an option to automatically clear 100% of everything outside the whitelisted domains on every restart.

And always clean the cache, perhaps even for whitelisted domains unless the system is on a metered/slow connection.

Also, every website should always be opened in a separate "container" so cross-site tracking won't work.

If Chrome did that today this would trigger a cascade of consequences. If Firefox did that today it would just improve Firefox popularity and cause no problems.