Facebook like button 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. The like button is one of Facebook's social plug-ins, in which the button can be placed on third-party websites. Its use centers around a form of an advertising network, in which it gathers information about which users visit
Criticism of Facebook of perception that conservatives are not treated neutrally on Facebook alternative social media platforms have been established. This perception has led to a reduction of trust in Facebook, and reduction of usage by those who consider themselves to be conservative. In October, 2018, Facebook and Facebook Messenger is said to be blocking urls to minds.com, a social network website that is a competitor of Facebook. Users have complained that Facebook marks links to Facebook's competitor as "insecure" and have to fill a captcha to share it with other users. In 2015, Facebook was accused of banning rival network Tsu.co in