You like the "Temporary Containers" extension. It automatically creates a new container for every site that doesn't already have an assigned container. The temporary container (cookies, etc) get deleted 30 minutes after you close the last tab for the container's site.
I use Sandboxie with a browser instance without cookies or cache. It automatically deletes files after closure. Only the browser is allowed internet access.
For specific services like my primary email, I have an isolated Firefox instance keep the cookies for that service only. I don't use that instance for anything but that service. Is there anything I'm giving them (besides what information you give by using the service at all of course)in keeping the cookie? Just want to be aware of any risk I may have overlooked.
https://addons.mozilla.org/en-US/firefox/addon/temporary-con...