Bryan Alger of Facebook went on what’s becoming a somewhat famous Mozilla bug tracker thread to ask them to do the right thing:
I am the Facebook engineer examining the adoption of webp as a serving format. We are very excited about the new format and keeping a close eye on the community to monitor adoption. It is entirely likely we will be serving webp images in some capacity in the short term after we address user complaints from our limited testing. It goes without saying, we would love to see webp support coming to Firefox soon.
Whether or not he got their attention, he at least got that of Stephen Shankland on CNET (big fan) and mine. Thanks Facebook.