I am told by a friend that he has arranged two meeting today first for 15:30 the second for 16:00 nothing has arrived on my laptop or email what has gon wrong

You deserve a zero for non-existent support.

I do not understand how to use it. There are no instructions.

This extension doesn't offer much as it requires the Zoom client to be installed on the machine to start or join meetings.

difficult to navigate

Could you please add a functionality to close open tabs when join a meeting. Thanks!