Remove names from Facebook posts and comments allow them to be screenshotted and posted to internet forums without exposing user identities.

facebook-anonymiser.js

(function() {
  var hash = {};
  var anonymise = function() {
    // Handle links to user profiles, e.g. those shown when someone likes a post
    Array.prototype.forEach.call(document.querySelectorAll('[data-hovercard*="user.php"], [data-hovercard*="hovercard.php"]'), function(hovercardLink) {
      if (!hovercardLink.dataset.hovercard) return;
      var id = /id=(\d+)/.exec(hovercardLink.dataset.hovercard)[1];
      var hue = hash[id] = hash[id] || (Math.random() * 360);
    
      hovercardLink.style.background = 'hsl(' + hue + ',55%,60%)';
      hovercardLink.style.color = 'hsl(' + hue + ',55%,60%)';
    
      var img;
      if(img = hovercardLink.querySelector('img')) {
        img.style.visibility = 'hidden';
      }
    });
    
    // Handle comment containers by hiding the 'Write a comment' entry and handle each comment avatar/name 
    Array.prototype.forEach.call(document.querySelectorAll('.UFIContainer'), function(container) {
      var addComment = container.querySelector('.UFIAddComment');
      var lastComment = container.querySelector('.UFILastComment');
    
      if (addComment) {
        addComment.style.display = 'none';
        lastComment && lastComment.classList.add('UFILastComponent');
      }
    
      Array.prototype.forEach.call(container.querySelectorAll('.UFIComment'), function(comment) {
        var imageBlock = comment.querySelector('.UFIImageBlockImage');
        var actorName = comment.querySelector('.UFICommentActorName');
      
        if (!imageBlock.dataset.hovercard) return;
        var id = /id=(\d+)/.exec(imageBlock.dataset.hovercard)[1];
        var hue = hash[id] = hash[id] || (Math.random() * 360);
    
        imageBlock.querySelector('img').style.visibility = 'hidden';
        imageBlock.style.background = 'hsl(' + hue + ',55%,60%)';
        actorName.style.background = 'hsl(' + hue + ',55%,60%)';
        actorName.style.color = 'hsl(' + hue + ',55%,60%)';
      });
    });
  };
  
  var observer = new MutationObserver(anonymise);
  observer.observe(document.body, { childList: true });
  
  anonymise();
})();