You can. Simply add an expression rule '*' (asterisk without quotes) to the greylist. Entries in whitelist takes precedence. Anything not matching will then fall under the new greylist entry. Feel free to visit our GitHub repo for documentation and FAQs, as well as to request new features or new bugs.

Not sure what area you are referring to. Please open a new issue via https://github.com/Cookie-AutoDelete/Cookie-AutoDelete/issues/new/choose so that it may be resolved sooner.