molly mounting plates for window visors

Doesnt this add to much weight to the visor and cause it to sag or drop down?

 

Depends on how much weight you mount to it. I’ve personally never liked the idea of objects attached to the visor because everything in the vehicle becomes a projectile in an accident, but some people put their entire EDC kit up there. Saw a fixed blade mounted handle toward the windshield once and thought that was particularly stupid