Examine source code of Turtl bookmarking

{
  "manifest_version": 2,
  "name": "Turtl",
  "description": "A bookmarking utility for the Turtl app (https://turtlapp.com/)",
  "version": "0.7.3resigned1",
  "icons": {
    "48": "data/images/favicon.48.png",
    "96": "data/images/favicon.96.png",
    "128": "data/images/favicon.128.png"
  },
  "minimum_chrome_version": "28.0",
  "permissions": [
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "util.js",
      "comm.js",
      "pairing.js",
      "bookmark.js",
      "main.js",
      "data/mootools-core-1.4.5.js",
      "data/sjcl.js",
      "data/tcrypt.js"
    ]
  },
  "browser_action": {
    "default_icon": "data/images/favicon.96.png",
    "default_title": "Bookmark this page in Turtl"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Down"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "turtl@lyonbros.com"
    }
  }
}