The Facebook (Beta) app has updated and has added the ability to respond with Reactions (i.e. emoticons) on comments. The main Facebook app on Windows 10 and Windows 10 Mobile devices currently allows for Reactions on posts but once a user navigates into layers of a discussion in comments, they're forced to revert back to basic likes (how barbaric).
Facebook (Beta), like other beta apps, is used to test features with a small userbase before rolling them out to the general population.
Are you a fan of the Facebook app experience on Windows 10? Let us know in the comments below.