I was able to use Zoom in the browser with my first meeting, but now it no longer shows that option when I access a Zoom meeting URL. What do you do to force it to let you use it in the browser?
AFAICT, you need to first click on the link to install the app, taking the first step in that direction. But then close whatever app install window that opens, return to the invitation page, and the Join From Browser link should have appeared.
Basically, the option to join from a browser is only shown once you first signal intent to install the app. This procedure is described in the Zoom docs:
The last time I looked, you have to be logged in, and then after requesting to join you have to wait on the page that tells you to install the app to join for a few seconds before the web joining link appears.
However, the ZOOM web client lacks quite a few features, including viewing the video of more than one participant at a time. I believe it's also not possible to share audio. So if you need to do any of these things, you really still have to install the ZOOM client on your computer!