Facebook June 2010. After extensive testing and years of questions from the public about whether it had an intention to incorporate a "Dislike" button, Facebook officially rolled out "Reactions" to users worldwide on February 24, 2016, letting users long-press on the like button for an option to use one of five pre-defined emotions, including "Love", "Haha", "Wow", "Sad", or "Angry". Reactions were also extended to comments in May 2017. Facebook Messenger is an instant messaging service and software application. Originally developed as Facebook Chat in 2008, the company revamped its messaging service in 2010, and subsequently released standalone iOS and Android
Facebook like button Electronic Privacy Information Center, Privacy Activism, Privacy Lives, and Privacy Rights Clearinghouse sent an open letter to Facebook requesting that it "Do not retain data about specific visitors to third party sites that incorporate "social plugins" or the "like" button, unless the site visitor chooses to interact with those tools." Multiple governments have also launched investigations into the activity. In September 2010, then-Privacy Commissioner of Canada Jennifer Stoddart announced new investigations against Facebook, alleging that the like button's appearance outside Facebook violates Canada's privacy laws. In August 2011, the German Data Protection Commissioner’s Office ordered federal agencies to stop using