This functionality seems to be partially included in the official extension now. There's a "search container name field", but it's not active when you open the

This functionality seems to be partially included in the official extension now. There's a "search container name field", but it's not active when you open the pop-up (hence the partial). I don't know when it arrived, I'm pretty sure it hasn't been there too long, but I don't pay too much attention to this extension's UI. I'm running Firefox 109.