mod_pagespeed does not rewrite pictures because of "uncacheable content" despite correct html headers – Debian
mod_pagespeed shows in the html debug that it does not cache any pictures because of <!--Uncacheable content, preventing rewriting of https://www.example.com/foo.png--> The header of all pictures has a Cache-Control: max-age=31536000, public, so that should be okay. The page is on…