I use Vivaldi, but on most browsers there is an "Accept Cookies" setting that is tri-state: All, Session Only and Never (third-party cookies is a parallel setti

I use Vivaldi, but on most browsers there is an "Accept Cookies" setting that is tri-state: All, Session Only and Never (third-party cookies is a parallel setting). You can change it to "Never" then set up site-specific exceptions for the sites you do want to allow cookies on, e.g. Hacker News.