Examine source code of Testing Daily

{
  "name": "Testing Daily | The Tester's Home Page",
  "description": "Get the feed of the latest testing news.",
  "version": "1.1.2.0",
  "manifest_version": 3,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "1f51perefec1293Dfc35491aCf78eaFF87@testingdaily"
    }
  },
  "action": {
    "default_title": "Testing Daily"
  },
  "chrome_url_overrides": {
    "newtab": "src/index.html"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "http://*.testingdaily.info/*",
    "https://*.testcasehub.net/*"
  ],
  "icons": {
    "16": "logo/16.png",
    "32": "logo/32.png",
    "48": "logo/48.png",
    "96": "logo/48.png",
    "128": "logo/128.png"
  }
}