Examine source code of XPath Finder Klass

{
  "manifest_version": 2,
  "name": "XPath Finder Klass",
  "description": "点击任意元素获取XPath",
  "homepage_url": "https://github.com/trembacz/xpath-finder",
  "version": "1.0.1",
  "icons": {
    "64": "icons/default-64.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/default-64.png",
    "default_title": "点击任意元素获取XPath"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "inspect.js"
      ]
    }
  ],
  "commands": {
    "toggle-xpath": {
      "suggested_key": {
        "default": "Ctrl+Shift+U",
        "mac": "Command+Shift+U"
      },
      "description": "Toggle plugin"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{874ecdd6-49b4-4d12-ab83-11c3568c872f}"
    }
  }
}