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
Criticism of Facebook Criticism of Facebook Criticism of Facebook relates to how Facebook's market dominance has led to international media coverage and significant reporting of its shortcomings. Notable issues include Internet privacy, such as its use of a widespread "like" button on third-party websites tracking users, possible indefinite records of user information, automatic facial recognition software, and its role in the workplace, including employer-employee account disclosure. The use of Facebook can have psychological effects, including feelings of jealousy and stress, a lack of attention, and social media addiction, in some cases comparable to drug addiction. Facebook's company tactics have also received prominent coverage,