Instagram has installed a new privacy setting which will default all new and existing underage accounts to an automatic private mode.Instagram now has 3 billion monthly active users, Meta CEO Mark Zuckerberg said on his Instagram account on Wednesday. "What an incredible community we've built here," Zuckerberg posted on his Instagram channel. The figure is a major milestone for the photo-sharing app, which the social media company acquired in 2012 for $1 billion.Meta last disclosed Instagram's user figures ...