Use a vpn with a Eu server. More sites like google will show a cookie popup with the “reject all cookies” option.
Reject all cookies if it exists. Otherwise accept cookies and then click on the :
shield icon > cookies and site data > delete (trash icon)
This is super useful when you want to read an article on some news website and it shows a cookie popup.
I assumed you meant the whitelisting not the autodelete - cookie autodelete on close has been in FF for years, but some time recently they brought in whitelisting as well - go to settings, privacy and security, cookies and site data, manage exceptions
Might be worth deleting CAD and use the inbuilt option to reduce canvas fingerprinting