I use multi account containers and it doesn't work for me. For instance, if I go to amazon.com directly, I get my Amazon container. But if I do a search in Google and then click an Amazon link I will still be in the Google container.
This is fixed now with the Limit to Designated Sites feature. It's a little buried though: click the multi-account containers button in the title bar > the arrow next to your Google container > Manage This Container > Limit to Designated Sites.
Thank you. This is the what I am after. Unfortunately Limit to Designated Sites does not work when combined with the Containerize add-on.
You can right click to open in a specific container. Take a bit of forethought though.