Examine source code of AWS Favicons

{
  "manifest_version": 2,
  "name": "AWS Favicons",
  "description": "Favicons for all AWS services",
  "version": "0.2.0",
  "author": "Maddison Hellstrom",
  "icons": {
    "32": "assets/extension-icon-32.png",
    "64": "assets/extension-icon-64.png",
    "128": "assets/extension-icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.aws.amazon.com/*"
      ],
      "js": [
        "bundle.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "icons/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{37aa84f3-dfba-43ee-8da6-875ec5af3072}"
    }
  }
}