Examine source code of Text Direction Fixer

{
  "manifest_version": 2,
  "name": "Text Direction Fixer",
  "version": "1.3",
  "description": "Fixes you text direction problems in websites.",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "192": "icon192.png"
    },
    "default_title": "Fix Text Direction"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "192": "icon192.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{25129a70-1ed7-4b98-92a4-bfe0322d8998}"
    }
  }
}