What's interesting to me is that this is done in Chrome, which has given eg, Adblock some trouble since it does not really allow extensions to change the page c

What's interesting to me is that this is done in Chrome, which has given eg, Adblock some trouble since it does not really allow extensions to change the page content, only hide parts of it. Would be interested in a technical look at how it's managing to filter out the facebook bugs given that limitation -- or has Chrome been updated to give extensions more power?