Yeah, I remember this vulnerability getting a lot of attention back when that bug was filed. I don't remember how the browsers decided to fix it, but there was

Yeah, I remember this vulnerability getting a lot of attention back when that bug was filed. I don't remember how the browsers decided to fix it, but there was some kind of fix. What happened in the last decade that changed that? And what went wrong in the browser-makers' processes for the underlying issue to be forgotten or overlooked?