Facebook – Unresponsive Facebook News Feed

Facebook keeps on performing some sort of A/B testing, where few users (based on some business logic of facebook) will see one UI, while rest will see other UI.
I don't know how it could be possible at the time this question was posted, but currently you can give a try to these steps:

1. On sidebar of the homepage, you will see 'triple dot' next to News Feed link.
2. Click on this. If you don't have this option, it means right now this feature is not available to you.
3. You will see multiple options here, like:
   i. Prioritize who to see first: Select names of friends whose posts you want to see on the top of your timeline.
   ii. Unfollow people to hide their post: You can unfollow your friends right from here, so that their post will never be displayed on your TL, unless you follow them again.
   iii. Reconnect with people you have unfollowed: If you had previously unfollowed someone, you can refollow them right from here.
   iv. Discover Pages that match your interest: Relevant pages based on your activity will be suggested by facebook. Click like to get their notification.
   v. See more options: If you have any hidden apps then you can manage them from here.
   
   Please have a look at the screenshot:
   

This may be an issue with the temporary files for each browser. Depending on your browser, you need to go to your options and clear all browsing data (like cookies, cache, temporary files, and / or history - whatever your browser is calling all of the stuff).

Browsers save information from websites as temporary files on your computer so it will load faster the next time you visit because many of the files are already downloaded. These sometimes get old and need to be updated. And to update them, the easiest thing is to delete everything and visit again.