Examine source code of TanGo

{
  "name": "TanGo",
  "description": "Simple and quick way to check word and kanji frequencies on the web.",
  "version": "0.0.1",
  "manifest_version": 2,
  "icons": {
    "16": "./images/16x16.png",
    "32": "./images/32x32.png",
    "48": "./images/48x48.png",
    "128": "./images/128x128.png"
  },
  "background": {
    "persistent": true,
    "scripts": [
      "./kuromoji/build/kuromoji.js",
      "./js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "./js/content.js",
        "./kuromoji/build/kuromoji.js"
      ]
    }
  ],
  "options_page": "./html/options.html",
  "options_ui": {
    "page": "./html/options.html",
    "browser_style": true
  },
  "browser_action": {
    "default_popup": "./html/popup.html"
  }
}