mozilla/bedrock — pull request #408 by apapirovski (2012-10-10 17:20:24+00:00)
Title: Lossless optimization of all the images

So not sure if this is actually of interest, but I optimized full _img_ folder with OptiPNG, PNGCrush, AdvPNG, PNGOut, JPEGOptim, and jpegtran. There were a few folders that were already optimized but definitely a very small percentage. Savings range between 5% and 20% per folder (with some files reduced by 60-70%).