Examine source code of URL Recorder

{
  "manifest_version": 2,
  "name": "URL Recorder",
  "version": "1.0",
  "description": "记录浏览历史并同步到服务端",
  "permissions": [
    "tabs",
    "http://localhost:5000/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{33453495-216e-4e1e-bf15-85aa9be0798f}"
    }
  }
}