It's bad enough that you have five Zoom meetings this morning. Why, when the meetings are done, do you have to come back to a browser with five "Launch Meeting" tabs?
Look: this is far from the biggest problem in the world right now. I know that. At some level, though, I need to focus on the problems I can solve, and I don't know of any browser extensions that could, for example, convince world leaders to take climate change seriously enough to ensure the long-term survival of the human race. If you find something like that, let me know, but for now, let me solve the Zoom thing for you.
Just install an extension called Zoom Auto Close. It's available for Chrome, Microsoft Edge, and Firefox. All this extension does is close the "Launch Meeting" tab after you open a Zoom link. It's perfect, just like you, and you deserve each other.
I hope your life is a little bit better after you install it—mine certainly is.