Facebook discourages providing sources

A friend posted an article about a political candidate. I wanted to find a related article and add it to that conversation. So, I opened the browser, got pulled into a couple offline things, found the article, got pulled in a couple other offline directions, and went back to the post. The app refreshed and went to the top of the newsfeed.

Now, I cannot seem to find the original.

Guess I should stick to the browser where everything is in tabs so I don’t lose my place.