Examine source code of Unhide Nodes

{
  "name": "__MSG_apNm__",
  "description": "__MSG_apDsc__",
  "homepage_url": "https://tech4computer.wordpress.com",
  "manifest_version": 2,
  "default_locale": "en",
  "version": "0.5.2resigned1",
  "icons": {
    "16": "images/icon16.png",
    "19": "images/icon19.png",
    "21": "images/icon21.png",
    "32": "images/icon32.png",
    "38": "images/icon38.png",
    "48": "images/icon48.png",
    "64": "images/icon64.png",
    "128": "images/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon19.png",
      "38": "images/icon38.png"
    },
    "default_title": "__MSG_apSt__",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "images/*.png"
  ],
  "background": {
    "scripts": [
      "npbg.js"
    ]
  },
  "permissions": [
    "tabs",
    "activeTab",
    "contextMenus",
    "storage"
  ],
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "np.css"
      ],
      "js": [
        "np_cs.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{03de80e8-fb74-4ac1-922f-d734ce276383}"
    }
  }
}