A temporary ban on graphic content was imposed in May following complaints about videos which depicted people being decapitated.
Facebook removed the reported videos and said it was reviewing its policy on this type of graphic content.
Now the company has relaxed its stance. It will allow violent content such as beheadings to be published, provided the intent is to raise awareness rather than celebrate violence.
Facebook’s user conditions prohibit photos or videos that “glorify violence or attack an individual or group.”
A spokesperson for Facebook said it will allow users to post violent videos that appear to condemn the actions depicted.
“If the video were being celebrated, or the actions in it encouraged, our approach would be different,” a spokesperson told CNNMoney.
The firm said warnings may be displayed ahead of graphic videos.
The change in policy, first reported by the BBC, drew a wave of protest from Facebook users and others on Twitter.
British Prime Minister David Cameron criticized the decision. “It’s irresponsible of Facebook to post beheading videos, especially without a warning. They must explain their actions to worried parents,” he tweeted.
The new rule appears to provide a gateway for certain types of extreme content to dodge existing filters. Facebook prohibits nudity, drug use and pornography, and these restrictions will stay in force.
Much of the outcry drew attention to the apparent discord in Facebook’s policies, which permit extreme violence but may require images of breastfeeding mothers to be removed.
The issue also reignited a wider debate over whether Facebook is a content platform or news publisher.
Facebook says it will make a call on the intent behind each piece of graphic content but gave no guidance on how that decision will be made.
It says its policies are under constant review and aren’t set in stone.
The social media powerhouse says it provides a place where people share their experiences and talk about what’s happening in the world. But as it wrestles with free speech, users are left unsure as to what kind content will be censored.