Examine source code of XSS Finder

{
  "manifest_version": 2,
  "name": "XSS Finder",
  "version": "1.0",
  "description": "Detect potential XSS injection points in the current web page.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_title": "Find XSS Vectors",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b437a5f4-a180-4fa4-9448-20c14d3bd636}"
    }
  }
}