Waddington shared his discovery with sister blog Inside Facebook, saying that the coding was likely intended for an XFBML hashtag plugin, similar to the hashtag-tracking widget Twitter provides for developers and publishers on its platform.
Waddington also told Inside Facebook the hashtag coding redirects to Facebook.com, rather than generating a 404 error page, leading him to believe the social network set aside the page for a future feature.
Facebook-owned photo-sharing network Instagram already uses hashtags.
Readers: Would you like to see Facebook incorporate hashtags?
Coding screenshot courtesy of Tom Waddington via Inside Facebook. Laptops surrounding hashtag image courtesy of Shutterstock.