I am running MacBook Pro Retina Laptop with OS 11.6
there is nothing i can attach to show you because the only thing i get is a spinning wheel when Dropbox Passwords tries to start up. It never starts and the wheel keeps spinning so I have to quit Dropbox passwords to get rid of the spinning wheel.
As far as I know I am not running a browser when this startup failure happens. I think it is the Dropbox Paswords app itself but it is not so clear to me. My default browser is Firefox.