AFAIK, Zoom can "run in the browser" in the sense that when you click a Zoom link it prompts you to install a "Zoom Launcher plugin" which is for all intents and purposes a binary application that you install locally. I wouldn't call that "running in the browser". Or has something changed recently?

Pretty sure it’s always been the case it can run as WebRTC in the browser. They make it hard to find, but if you reject all their crapware there is a link to just continue in the browser and join a zoom.