That's fair, but the actual extension <https://github.com/kskashyap94/zoom-auto-close https://github.com/kskashyap94/zoom-auto-close> is like ten lines of code.

That's fair, but the actual extension <https://github.com/kskashyap94/zoom-auto-close https://github.com/kskashyap94/zoom-auto-close> is like ten lines of code. If you don't trust it not to change into something malicious, create a local copy. It's just closing tabs after a bit of time, and scoping that code to Zoom URLs...