You will have better luck checking the developer/ news forums. If you wish to submit feedback here is the site. https://input.mozilla.org/

*http://arstechnica.com/information-technology/2013/04/chicken-meets-egg-with-facebook-chrome-webp-support/ ---- *[https://bugzilla.mozilla.org/show_bug.cgi?id=856375 bug 856375] - Implement WebP image support, take 2 <i>Please do not comment in bug reports<br>https://bugzilla.mozilla.org/page.cgi?id=etiquette.html</i> You can vote for a bug to show your interest<br>https://bugzilla.mozilla.org/page.cgi?id=voting.html