Examine source code of Web Editor Plus

{
  "name": "Web Editor",
  "version": "1.0.9",
  "description": "Forget about all the Code chaos and Customize your website in a handy way",
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "webeditor.js"
      ],
      "css": [
        "webeditor.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "16": "images/webeditor16.png",
      "32": "images/webeditor32.png",
      "48": "images/webeditor48.png",
      "128": "images/webeditor128.png"
    }
  },
  "icons": {
    "16": "images/webeditor16.png",
    "32": "images/webeditor32.png",
    "48": "images/webeditor48.png",
    "128": "images/webeditor128.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{971b5f74-90e7-4c8f-8a54-344f3c115cc5}"
    }
  }
}