Examine source code of Manhwa Tracker

{
  "manifest_version": 2,
  "name": "Manhwa Tracker",
  "version": "1.2.0",
  "description": "A Firefox extension to track your reading manhwa progress.",
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "library.html"
  ],
  "permissions": [
    "activeTab",
    "tabs",
    "https://graphql.anilist.co/"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; connect-src https://graphql.anilist.co",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3456e31e-e73a-4d4a-8b28-fd797357dff9}"
    }
  }
}