Lofesa edited a comment on issue #1959: Images not lazy-loading URL: https://github.com/apache/incubator-pagespeed-mod/issues/1959#issuecomment-537179588 But when you try it on a chrome browser, you get the webp images? You have enabled convert_jpeg_to_webp so the images must be converted when the browser send the apropiate image headers in the request. Try https://www.yourdomain.com/?PageSpeedFilters=+debug this inject debug messages in the html code ( you need to view the html code of the page) P.D: I can“t see a pagespeed Domain directive, some like pagespeed Domain http*://www.yourdomain.com where www.yourdomain.com is the comain that is set in the final html code in your site https://www.modpagespeed.com/doc/domains#auth_domains
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