It is designed to work with and supplement the Multi-Account Containers add-on. There a few things that are annoying and could use better integration. First, al

It is designed to work with and supplement the Multi-Account Containers add-on. There a few things that are annoying and could use better integration. First, all the temporary containers show up in the list of containers you have created. Most of the time you can ignore that list, so it isn't a big deal, but if you need to configure a permanent container (and you have 100s of tabs open) the clutter makes them harder to find in the long list. When you tell Multi-Account Containers to always open a domain in a specific container, Temporary Containers knows about this, but for some reason it prompts you for additional confirmation. And sometimes this prompt breaks sites the first time through, adding an additional iteration when trying to configure a container to work with a site that uses multiple domains. Other than that they work together fine. I would also recommend the Cookie Quick Manager extension, which lets you manage cookies on a per-container basis. If you have been using Multi-Account Containers by it self, then any links you open from a page will open in the same container (say reading news sites from HN), and you likely have a bunch of cross-site cookies stored there. This extension will let you clear out any undesired third-party cookies that have gathered in the container. The UI is a bit unclear at first (which of these three trashcan icons scattered across the page delete the subset of cookies I want), so read the tooltips before clicking an icon.