Some Android apps, while useful, can be quite destructive to your phone’s background process. For instance, Facebook (while being a top app in the Play Store) is extremely resource intensive, and can consume quite a bit of RAM on older devices.
The best option would simply be using an alternative like Facebook Lite or browsing their website via the mobile Facebook link.
Check out our video in which we highlight other apps that can wreak havok on your phone and your privacy.