Change record status: 
Project: 
Introduced in branch: 
11.1.x
Introduced in version: 
11.1.0
Description: 

A directive has been added to core's default .htaccess file that attaches the correct image/webp header for webp images when the MIME Apache module is enabled. This is needed for sites hosted on Apache web servers running on operating systems that do not support the webp image MIME type.

--- a/.htaccess
+++ b/.htaccess
@@ -184,3 +184,7 @@ AddEncoding gzip svgz
   # Disable Proxy header, since it's an attack vector.
   RequestHeader unset Proxy
 </IfModule>
+
+<IfModule mod_mime.c>
+  AddType image/webp .webp
+</IfModule>
Impacts: 
Site builders, administrators, editors