# BEGIN W3TC WEBP
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{HTTP_ACCEPT} image/webp
    RewriteCond %{REQUEST_FILENAME} (.+)\.(jpe?g|png|gif)$
    RewriteCond %1\.webp -f
    RewriteCond %{QUERY_STRING} !type=original
    RewriteRule (.+)\.(jpe?g|png|gif)$ $1.webp [NC,T=image/webp,E=webp,L]
</IfModule>
<IfModule mod_headers.c>
    <FilesMatch "\.(jpe?g|png|gif)$">
        Header append Vary Accept
    </FilesMatch>
</IfModule>
AddType image/webp .webp
# END W3TC WEBP