Examine source code of EloWard

{
  "manifest_version": 2,
  "name": "EloWard",
  "version": "2.1.5",
  "description": "Injects real-time League of Legends rank badges into Twitch chat so you can seamlessly display your rank on any channel",
  "icons": {
    "16": "images/logo/icon16.png",
    "48": "images/logo/icon48.png",
    "128": "images/logo/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "vendor/browser-polyfill.js",
        "js/content/content.js"
      ],
      "css": [
        "css/content.css"
      ]
    },
    {
      "matches": [
        "https://www.eloward.com/*"
      ],
      "js": [
        "vendor/browser-polyfill.js",
        "js/core/extensionBridge.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "images/logo/*.png"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; img-src 'self' data: https://eloward-cdn.unleashai.workers.dev",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/logo/icon16.png",
      "48": "images/logo/icon48.png",
      "128": "images/logo/icon128.png"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "https://www.twitch.tv/*",
    "https://gql.twitch.tv/*",
    "https://*.unleashai.workers.dev/*",
    "https://www.eloward.com/*"
  ],
  "background": {
    "page": "background.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "eloward@unleashai.workers.dev",
      "data_collection_permissions": {
        "required": [
          "websiteActivity",
          "personallyIdentifyingInfo"
        ]
      }
    }
  }
}