Mossbergs have a thumb safty as do most double barrels. I assume the Browning does do by the way you post sounds. i don't know much about those but I am sure they are a good gun...the only advantage to a bottom eject I can see would be for left hand shooters....However I shoot long guns left handed and I have never had a problem with the right side ejectiors. I have a nova and with a little know how you can change the safety over to a lefty pretty easy.