With "Disable cache" ticked in DevTools, Chrome ignores the preloads in a 103 Early Hints response. A working Early Hints setup can therefore look like it does nothing while you test it.

What changed in DevTools

The November 2026 DevTools update (20 October) shows a warning in the Early Hints section of the request's Headers tab when the response includes preload links while Disable cache is active, and explains that Chrome ignores them.

How to check Early Hints

Untick Disable cache first. For a cold load, use a fresh Incognito window.

Sources

I post short notes like this on LinkedIn.

Blueprint card: "Disable cache hides your Early Hints." Checking Early Hints? Untick Disable cache first.

Have an Angular app that needs a senior hand?

Tell me about your app and what is slowing your team down. We go through it on a call and you leave with concrete next steps.