Examine source code of LevenSearch

{
  "manifest_version": 2,
  "name": "LevenSearch",
  "version": "0.9",
  "description": "Search for strings using levenshtein distance.",
  "icons": {
    "48": "icons/icon-32.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/icon-32.png",
    "default_title": "LevenSearch",
    "default_popup": "popup/search.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content_scripts/levensearch.js"
      ]
    }
  ]
}