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On Wednesday, Facebook announced a new portal that lets users see which Internet Research Agency-linked Facebook pages or Instagram accounts they liked or followed between January 2015 and August 2017, when the pages were shut down, CNN reported.

The Internet Research Agency is a troll farm with ties to the Russian government.

"It is important that people understand how foreign actors tried to sow division and mistrust using Facebook before and after the 2016 US election," the company wrote in a blog post.

The new tool will be available by the end of the year via the social network's Help Center.

Facebook said the portal is part of its continuing effort to "protect" its platforms and users from "bad actors who try to undermine our democracy."

However, not all of those users will be able to take advantage of the portal. The tool applies to users who followed or liked those accounts. It won't work for users who saw posts from the accounts on their feed because a friend liked them or who saw them via paid advertisements. Users will also have to know the feature exists and how to access it -- Facebook will not simply show the information to them on its own.

Facebook estimates that close to 150 million Americans may have been exposed to content from the Internet Research Agency between June 2015 and August 2017 on Facebook and Instagram.