Social Fixer for Facebook is a user-friendly app that can help you filter your news feed. It is the best way to stop unwanted posts from appearing in your news feed. You can hide posts you read or things you don't want to see, and it has features to help you with that. 

Features

It allows you to filter posts by content, author, link URL, and more. It also has pre-defined filters which hide sponsored content and political posts. This makes it easy to keep your feed free from types of content you don’t want to see.

This extension also features a Stealth Mode. With this, you don’t have to worry about accidentally hitting like buttons. It hides the comment section as well.