Problem loading icons from the extension with chrome-extension://...

[Tahtu]

I'm developing an extension with my own icons for the extension button in the toolbar of chrome, depending on the state of my extension.

While doing this, I get sometimes a bug inside the DevTools “Laden von Abrufen beendet: GET …”, (English: “Loading fetches finished: GET ….”) followed by the URL of the icon starting with “chrome-extension://myid/path/icon_16.png”.

Inside the manifest.json file I have this:

  "manifest_version": 3,

  "web_accessible_resources": [{

    "matches": ["*://*/*"],

    "resources": ["*.*"]

  }]

Why can Chrome not access to these URLs sometime, even sometimes it works as well?

[wOxxOm]

If the icon is actually shown, it's simply a bug in devtools.

[Tahtu]

My mistake: I've used chrome.action.setIcon with an absolute path, but it must be relative to the extension path.

[Tahtu]

I forwarded this problem as a bug:

https://bugs.chromium.org/p/chromium/issues/detail?id=1352752