fbpurity.com/
Basically, you can install it and add it on to your browser (I’m not sure which ones it’s compatible with, but we use Chrome - other browsers are Internet Explorer, Safari, Mozilla Firefox, among others). It runs automatically, but you determine the settings. So when you load Facebook after installing it, you will get a little window in the browser asking you for your settings. You can turn off things like the “Trending Topics” box, game and app notifications, and determine the type of posts you see from friends. One of my favorite parts though is the text filter - I can type in words I don’t want to see from posts from anybody on my friends list. (I use it primarily to filter out posts hawking products from those “home-based businesses” i.e. pyramid schemes.)
After you set your initial settings, you can change them at any time by clicking the “FBP” link at the top right of the page on Facebook.
I love it and it has made Facebook a lot more fun for me. I could quit it, but I’d kiss most of my communication with my siblings and parents goodbye. I don’t love that it’s a primary method of keeping in touch with them, but I’d rather keep in touch than not, so, I use the medium they’re willing to use. Just on my terms.