Facebook is most popular website to explore things with others anywhere in the world. You use Facebook and sudden Facebook app wont load or not responding on a desktop browser like chrome, safari, Firefox etc. Here you will find few steps to try fix the problem.
Make sure your browser up to date
Clear the browser caches
You can login Facebook another browser
It's won't responding because of third party apps or plug-ins on your Pc. Remove them.
You can also help from Facebook community.