This fixes the official Multi-Account container extension's main weakness.

You can use this extension's "Isolation" setting so than when you click on a result in a search engine, for example, it automatically loads the new site in a temporary container instead of loading in the search engine's container.

Now Google can't follow you to the sites you open through its search results.

Edit: It seems the creator passed away in 2023. RIP, and thank you for the great extension.

this add on has changed my life, love it. it needs way more hype!!!

Great extension. This extension is the reason why Firefox is unique to all other browser compared to privacy.

I use this every day, it's invaluable for debugging websites as multiple users (e.g. where users interact) and Chrome has nothing like it - keep up the great work!

Best thing since sliced bread. You can create tons of independent containers. Especially useful with sites like Google news where I open it in one container then every news item in its own container. When I am finished reading the item, the container and all its cookies disappear.
Super for multiple logins on a single site simultaneously.

Beautiful security tab feature.
I recommend not using Auto mode, but using Alt+C to manually open tabs when needed.