An anonymous reader quotes a report from Bloomberg: Facebook will show people which Russian propaganda pages or accounts they've followed and liked on the social network, responding to a request from Congress to address manipulation and meddling during the 2016 presidential election. The tool will appear by the end of the year in Facebook's online support center, the company said in a blog post Wednesday. It will answer the user question, "How can I see if I've liked or followed a Facebook page or Instagram account created by the Internet Research Agency?" That's the Russian firm that created thousands of incendiary posts from fake accounts posing as U.S. citizens. People will see a list of the accounts they followed, if any, from January 2015 through August 2017. Facebook will only be showing people the names of the pages and accounts, not the content. A user will only see what they liked or followed, so if they simply saw IRA content in their news feeds, they won't be notified.