The mobile website has come a long way. It supports instant messaging (though not as seamless as Messenger), notifications, and news feed browsing. It is slower than a modern app, but it is infinitely safer than an abandoned APK.

Small file size (~10MB), lower RAM usage, and fewer crashes on older systems [12].

Note: On Android 4.4.2, this is a global setting. Remember to turn it off after installation if you are concerned about security.

: Sourcing old APK files from third-party websites exposes your device to malware, spyware, and phishing attacks. Modded or counterfeit APKs are frequently used by bad actors to steal login credentials. No Official Support