Not really 5.1. Most browsers are implementing the picture tag...however, it is important to note that they're the first to have a release supporting it. This topic Haas been discussed since responsive web design had an acronym.

It's just taxi lobbyists pushing back...Just like here... taxis suck compared to Uber.

I find it rather laughable that mostly everyone in the comments has taken a "forgive and forget" attitude in regards to this post. I love Mozilla...as a developer who uses their mdn site actively, I applaud their active involvement in creating awareness of their mistake so people like me can take measures in protecting their accounts, however, if it was another company, most of these comments would be lambasting this breach of security and protocol on their part. That being said, I'm confident that Mozilla has taken every action they can to prevent this from happening in the future. And, I'm looking forward to looking up a reference section on mdn this week!