Facebook, the biggest community media get a main challenge with it foremost mobile app (not the Facebook Lite) for occupying a great deal recollection area and consuming a set of mobile data. 

To me the main reasons that makes your main Facebook app to crash down/malfunction/misbehave are:
- large space occupied by the App
- low RAM size of your smartphone
- low phone storage

All these factors turn into it feasible for your Facebook app to crash

As for me I handle Facebook Lite which take the next advantage:
- low size app less than 2.0 MB
- low memory usage
- low mobile data usage

Here are probable customs to fit your Facebook app
1. Use Facebook Lite app
...................Read more at

https://www.techypals.com/2018/05/how-to-fix-your-facebook-app-crashing.html
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Here is the link
.....https://www.techypals.com/2018/05/how-to-fix-your-facebook-app-crashing.html