Favicon references resolve

A <link rel="icon" href="/favicon-32.png"> pointing at a file that does not exist returns 404 on the browser's favicon request, which in turn shows a default globe icon in the tab and logs a 404 in analytics for every page view. The missing icon is cosmetic but persistent: once a browser caches the 404 it does not retry for hours, so the fix does not show up immediately even after the file is added.

Either create the file at the referenced path or update the <link> tag to point at one that exists. For Next.js App Router the simplest fix is to drop favicon.ico directly in the app/ directory — Next.js injects the <link> tag automatically:

app/
  favicon.ico
  layout.tsx

For other frameworks, place the file under public/ or static/ and match the href exactly.