Examine source code of QuickMap

{
  "manifest_version": 2,
  "name": "QuickMap",
  "description": "Create and edit flowcharts seamlessly.",
  "version": "1.0.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "quickmap@kingfisherfox",
      "strict_min_version": "109.0"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "icons": {
    "16": "img/icon16.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "img/icon16.png",
      "48": "img/icon48.png"
    },
    "default_title": "QuickMap"
  }
}