I don’t think you need a guide. Just install the extension and give it a try. It’s pretty simple and intuitive.

still no possibility to set default container for Ctrl + T

It might be possible now, you could give it a try. But anyways, I don’t see how changing the default container for new tabs could be useful. There is a default container which is the “no container”, why would you want to change it?

Are you talking about these containers?

Each container is isolated from the others. If you don’t want a tab to track you, just use a dedicated container for it.

You can also configure Firefox to always use a dedicated container for certain domains.

As for destroying the data, you probably just need to clear cookies on close. That’s configurable. If you are extra paranoid you can also clear the cache.

Did I miss something?

Assuming you are not in a CGNAT, which is common for mobile networks: DNS with low TTL such as FreeDNS, pointing to your IP. And ofc, if you have a router in between, port-forwarding.

Otherwise, a VPN such as Tailscale. But you would need to install it on all your devices.

Otherwise, for HTTP(S) web services, a reverse-proxy such as CloudFlare.

Ah! Sorry for the textdump, and thanks for the feedback. I’ll keep it in mind in the future.

Sorry, not an answer to your exact question… Dockge might be the answer if you need a web UI to manage Docker containers.

If you need something more specific, like a button dashboard to run custom commands, perhaps you could build your own with Vite (Node.js). You will need to understand basic HTML, CSS and JavaScript. (EDIT: OliveTin makes more sense.)

As for authentication, you could configure a basic authentication on your favourite reverse proxy (such as Nginx), or look for something more advanced such as OIDC/OAuth2 through Keycloak.

Sure, that’s what I thought. And Ecosia doesn’t do the same?

I do have an opinion about Ecosia, but it’s just based on feelings, so it doesn’t even make sense to share it. Apologies for not answering your question.

Instead I would like to focus on this point:

Ecosia isn’t very private, since it sends data to Bing

Also DuckDuckGo does this, but they aggregate and anonymize that data before forwarding it to Bing. That’s probably the best they can do without building their own first-party infrastructure. I would imagine Ecosia does the same.