Examine source code of Shinden Sorter

{
  "manifest_version": 2,
  "name": "Sorter",
  "version": "1.0",
  "description": "A plugin to sort table data.",
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png",
      "48": "icon.png",
      "128": "icon.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9f93ad30-67c5-4bae-80f5-35e06e59cb9f}"
    }
  }
}