Instagram said it has ramped up teen safety measures in its popular photo-sharing app, with the announcement coming as the firm’s chief executive is set to testify before Congress and following bombshell reports that it was aware of the app’s harm to teenagers. Adam Mosseri, CEO of Instagram, said in a blog post that the company is rolling out new safety features aimed at the app’s youngest users, with a view to “keeping them safe” on the platform. “We’ll be taking a stricter approach to what we recommend to teens on the app, we’ll stop people from tagging or mentioning teens that don’t follow them, we’ll be nudging teens towards different topics if they’ve been dwelling on one topic for a long time and we’re launching the Take a Break feature” in several markets, including the United States, Mosseri wrote. The Take a Break feature, which Mosseri said on Nov. 10 that Instagram …