Facebook has rolled out a new tool to help some users figure out if they interacted with Russian propaganda during the 2016 U.S. presidential election. "The social giant's tool -- available here, through its Help Center -- specifically allows users to see if they followed or 'Liked' any pages and accounts set up by Kremlin-backed trolls on either Facebook or Instagram," reports Recode. From the report: Over the course of the 2016 election, Facebook estimates that roughly 140 million users may have seen Russian propaganda in their News Feeds or on Instagram. Much of that content sought to sow social and political unrest around divisive issues like race, religion and LGBT rights. But only a small slice of those 140 million affected users can actually take advantage of Facebook's new tool, which it first previewed in November. That's because the portal only aids those who directly followed one of the accounts or pages set up by Russian sources on Instagram and Facebook. It does not help users who may have simply seen Kremlin-sponsored content because their friends "Liked" it and it subsequently appeared in their own News Feeds. Facebook's new service also doesn't allow users to check if they saw some of the roughly 3,000 election-timed ads purchased by Russia's notorious trolls, known as the Internet Research Agency. About 10 million users saw those ads around the election, the company previously has said.