I suspect it might be something mentioned in https://github.com/masukomi/arc90-readability https://github.com/masukomi/arc90-readability. I believe it's what po

I suspect it might be something mentioned in https://github.com/masukomi/arc90-readability https://github.com/masukomi/arc90-readability. I believe it's what powers "readability" view in modern browsers (firefox https://github.com/mozilla/readability https://github.com/mozilla/readability, safari).