I've been using it for a very long time, it was great, but since last update it's no longer working for me. I'm not sure how you make this, I guess you disable display for sponsored div, or something like that. Now I realized while inspecting FB's feed source, is that, they divide "Sponsored" letter by letter in separated divs, also "Learn more" etc. Maybe disabling everything containing those divs? I don't know, I'm glad to help! (There's no way to contact author, btw).