Facebook has been testing tweaks to the desktop version of chat, and many users are seeing the latest test right now — bubbles. Facebook has tested bubbles before, and we’ve reached out to Facebook to see if this is another test or something that the site is working on rolling out.
Update: A Facebook spokesperson responded, saying that it is a test that was rolled out to all users.
It looks like Facebook is trying to keep the desktop experience consistent with it’s mobile Messenger, which recently went through an aesthetic improvement.
Readers: Have you seen this?