Examine source code of Tasker Integration

{
  "description": "Tasker Integration",
  "manifest_version": 2,
  "name": "Tasker Integration",
  "version": "0.0.0.1",
  "icons": {
    "16": "icons/tasker.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tasker_integration@atareao.es",
      "strict_min_version": "57.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/tasker.png"
  },
  "permissions": [
    "nativeMessaging",
    "activeTab",
    "tabs",
    "http://*/",
    "https://*/"
  ],
  "options_ui": {
    "page": "options/options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "css": [
        "content/content.css"
      ],
      "js": [
        "content/content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "icons/*.png"
  ]
}