Examine source code of CozyTab

{
  "manifest_version": 2,
  "name": "CozyTab",
  "description": "CozyTab — customizable New Tab dashboard",
  "version": "2.0",
  "icons": {
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "https://api.coingecko.com/*",
    "https://open.er-api.com/*",
    "https://api.open-meteo.com/*",
    "https://*.nrk.no/*",
    "https://geocoding-api.open-meteo.com/*",
    "https://ipapi.co/*",
    "https://air-quality-api.open-meteo.com/*",
    "https://services.swpc.noaa.gov/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cozytab@cozytab.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  }
}