Unfortunately, these sites are more user hostile each year.

I gave up on Facebook after a while, since last time I looked I was not able to get a working API key. We will probably need to switch to some scraping method if we want to get it working again, see https://github.com/fossar/selfoss/issues/1264.

As for Twitter, we still use API v1.1 and the standalone app I use works for me in selfoss.