No, most people don't just install stuff that lacks even a basic screenshot. The lack of any visuals asks all of us to give you too much credit for design quality in advance. There are risks to installing chrome extensions, on top of the time required to do so, and most online CV generators are hideous. If you refuse to show what yours looks like visitors have to go with the statistics and say yours is probably ugly too, hence no install. I can't imagine why you wouldn't show one, but it's your call.