Personally, I uninstalled the Facebook app but kept the Messenger app (with disabled chat bubble).

Works good enough for me. I browser Facebook on the browser when needed (never) and use Messenger for chat alerts.

On desktop, I use http://messengerfordesktop.com/ to avoid going on the Facebook website.

I also use custom CSS on the Facebook website to break some of it's linearity. This make it less likely that I will browse mindlessly. Facebook UI is designed as a precise drug and simply changing it a little bit will disrupt that. (I use a red UI, a noisy background, bigger fonts, etc.)