The browser will let users view real-time notifications from Facebook even when browsing different websites. The notifications will then direct the user to the Facebook app or mobile site.
http://tech.firstpost.com/news-analysis/facebook-teams-up-with-uc-browser-to-offer-instant-push-notifications-250275.html
http://play.google.com/store/apps/details?id=com.UCMobile.intl
Facebook Is Testing A Simple App For Low-End Android Phones, v1.0 was 251kb!
http://www.apkmirror.com/apk/facebook-2/lite/facebook-lite-1-0-0-0-0-official-apk/
http://techcrunch.com/2015/01/25/facebook-lite-rides-again/
http://play.google.com/store/apps/details?id=com.facebook.lite