Facebook begins testing reactions in Messenger, including a Dislike button
As first noted by TechCrunch and later confirmed by Facebook, the new reactions feature in Messenger is similar to the expanded reactions that are available in response to posts in the Newsfeed.
What’s different about the reactions available in Messenger compared to the Newsfeed, however, is the inclusion of a Dislike button. This has been one of the most-requested features for Facebook, but the company has routinely said it would not add a Dislike button for Newsfeed posts.
If the feature is met with a positive response (or reaction), however, the company says that it will expand it to all users and presumably to all platforms, like iOS, etc.