Extension of the Apache system. Htaccess file for browser-based delivery of WebP instead of JPEG image files. Especially for WordPress. More information about WebP and the snippet shown below http://cup.wpcoder.de/webp-jpeg-alternative/

.htaccess

<IfModule mod_rewrite.c>
	RewriteEngine On
	RewriteCond %{HTTP_ACCEPT} image/webp
	RewriteCond %{DOCUMENT_ROOT}/$1.webp -f
	RewriteRule ^(wp-content/uploads.+)\.(jpe?g|png)$ $1.webp [T=image/webp,E=accept:1]
</IfModule>

<IfModule mod_headers.c>
	Header append Vary Accept env=REDIRECT_accept
</IfModule>

AddType image/webp .webp