Such a shame....  Mozilla doesn't provide technical justification for refusing 
to support WebP else they would have provided it here.  GIF, PNG and JPEG are 
codecs that are unchanged from a time when people bought Sega Saturns to watch 
grungy 320x240 15fps Cinepak-encoded video off of 300kb/sec CD-ROM.  Now H.265 
achieves clear HD quality at that same bandwidth.  You'd think we've learned a 
few new things about compressing still images, too?

I don't see how mozjpeg can just improve the encoder side of JPEG to produce 
comparable results to WebP, just for one reason alone.  WebP can compress areas 
of low complexity in much larger tiles, which means larger images compress 
better.  Since laptops are coming out with QHD screen now (BTW, Firefox 40 beta 
crashes on my Lenovo Yoga2Pro.  Hmm...), and some image sites like Flickr and 
Tumblr already adapt to displays, it's about damn time for a new standard that 
*finally* integrates each best aspect of GIF, PNG and JPEG features into one 
forward-thinking format.

Speaking of mozjpeg, the last code submit to the official github repo appears 
to be 3 months ago.

     https://github.com/mozilla/mozjpeg/commits/master

And libwebp still appears to be very active.

     https://chromium.googlesource.com/webm/libwebp

BTW, Washington Post uses WebP format now.

Paul
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