Does not use HTTP/2 for all of its resources

HTTP/2 serves your page's resources faster and with less data moving over the wire.

How the Lighthouse HTTP/2 audit fails #

Lighthouse lists all resources not served over HTTP/2:

Lighthouse gathers all resources from the same host as the page and checks the HTTP protocol version of each resource.

Lighthouse doesn't check resources from other hosts because it assumes that you have no control over how third-party resources are served.

How to pass this audit #

Serve your resources over HTTP/2.

To learn how to enable HTTP/2 on your servers, see Setting up HTTP/2.

Resources #

• Source code for Does not use HTTP/2 for all of its resources audit
• Introduction to HTTP/2
• HTTP/2 Frequently Asked Questions