Facebook's Messenger might return to the main app, letting you access your social media feeds and messages in one spot, according to testing spotted by researcher Jane Manchun Wong. The Messenger app icon would remain, but instead of launching a standalone app, it would open Facebook and take you directly to a section called "Chats." That's roughly how it used to work before Facebook released Messenger as a standalone app in 2011 and removed it completely from the main app in 2014.

According to Wong, the company is starting to lay the groundwork for integrated messaging across all its services. The company reportedly plans to unify its Whatsapp, Messenger and Instagram messaging apps, adding end-to-end encryption to ensure user privacy.

The testing appears to be in early stages, and Wong said that the "Chats" section only has a basic text, and no reactions, calls, video or photos. For that, "you'd still have to open the Messenger app," she said. Facebook will still keep all three apps, she believes, because "they serve different markets."