Click To Contain by NietEenDoktor

Similar to Temporary Containers, but with limited functionality only handling the extremely limited usecase of creating a random+temporary container when a link is clicked upon.

The difference between the addons is the attempt of this addon to handle cases where the URL is changed before the click. This is done by adding a "mousedown" handler immediately when the link element is created. It theoretically should be called before any other handler.

This is experimental, so Temporary Containers might actually be what you're looking for if you're into nice UIs :)