Indeed - if having such a facility requires me to setup a container per top-level domain (e.g. one container for www.xyzbank.com and everything that it opens), then even that is worth it. Right now, with the combination of ublock origin and other privacy plugins, I don't even try to do financial transactions like banking/flight booking etc for the fear of being left with a semi-processed transaction. That is one of the main reasons of me installing Chrome (I know that Chromium might also be a good alternative for such scenarios).

I guess what I'm looking for is a "allow everything" container setup without having to enable/disable plugins or fiddle with white/blacklists.