WTFlinks works on Twitter&Facebook feed. It detects all posts which include a link (URL) to another website. Posts which have an embedded external link that redirects to another website like news, articles etc.. are going to have a new button. You click the button and see the contents of the link just under the tweet or facebook post. No need to visit another website.
When you click the button, the extension simply gets the content of that external URL, renders it and shows the content just below the specific tweet. Designed to work best with news pages but it works with many types of pages.
It gives you the power to evaluate the content right on your feed so that you won't have to visit an external web page. This also is how you skip the click-bait calls.