Examine source code of LightHide

{
  "manifest_version": 2,
  "name": "LightHide",
  "version": "2.1",
  "description": "高亮关键字，隐藏关键字。",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "LightHide"
  },
  "icons": {
    "128": "icon.png"
  },
  "options_ui": {
    "page": "options.htm"
  },
  "permissions": [
    "tabs",
    "<all_urls>",
    "activeTab",
    "storage"
  ]
}