Deliver WebP images with WebP Extension

[sheydin]

Dear community,

I am trying to deliver WebP images with the WebP extension (https://github.com/plan2net/webp/blob/master/README.md). The .webp images are being generated on the server, but no delivery to the browser. They all remain of content type content-type: image/jpeg and content-type: image/png.

Without bootstrap_package the webp images are delivered correctly. What is it in bootstrap_package that blocks it from happening and how to unblock it?

Thank you for your help.