As others have said, not very different from the original addon. I was unable to get the "clicking" working on a Mac, not sure what I need to click.

I'm looking for an addon that can switch containers through the context menu (right click), but seems that doesn't exist.

Good quick extension, but seems duplicate functionality of older 'Switch Container' https://addons.mozilla.org/ru/firefox/addon/switch-container/versions/ extension. Can you describe the differences between your extension and Switch Container in extension description, for understand the profit for users to select your version?

This is the first container add-on I've used. Default use, no issues.

This add-on is similar to "Switch Container", i.e., it switches the current tab's container to the chosen one. The problem is the switching is not smooth, for some reason, it's visible that a new tab pops up, with the proper container, then the current one is closed. That process is, actually, the only way to switch container, currently, but the switching is unnoticeable on other switching add-ons. Another problem, the add-on messes the add-ons manager page (about:addons becomes unusable if "switched"...)