Mazizieh commented on issue #1659: Pagespeed Not optimising part of website images. URL: https://github.com/apache/incubator-pagespeed-ngx/issues/1659#issuecomment-511281087 > Can you add this line?: > > ``` > pagespeed EnableFilters responsive_images; > ``` > > Hopefully ngx_pagespeed will emit comments in html mentioning why it backs out of optimization. It is already there, the comments I get are: ``` <!--Resource headers are preventing rewriting of https://www.example.com/media/catalog/product/cache/0/small_image/300x/95/9/5/9558-1.jpg--> <!--ResponsiveImageFilter: Not adding srcset because image does not have dimensions (or a src URL).--> ```
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