Examine source code of Asym

{
  "applications": {
    "gecko": {
      "id": "jid1-IAt0wQ2Nxv4Odg@jetpack"
    }
  },
  "manifest_version": 2,
  "background": {
    "scripts": [
      "js/chrome_proxy_min.js"
    ]
  },
  "browser_action": {
    "browser_style": false,
    "default_icon": "src/browser_action/icons/tool-128.png",
    "default_title": "Asym",
    "default_popup": "src/browser_action/chrome_options.html",
    "scripts": [
      "asym_util_min.js",
      "asym_account_min.js",
      "chrome_options_min.js"
    ]
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "js/chrome_bridge_min.js",
        "src/browser_action/asym_util_min.js",
        "js/asym_process_min.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "description": "Asym augments word spacing to improve your reading comprehension and speed.",
  "homepage_url": "http://asym.co",
  "icons": {
    "128": "src/browser_action/icons/tool-128.png"
  },
  "name": "Asym",
  "permissions": [
    "storage",
    "tabs",
    "https://*.aws.asyminc.net/*",
    "http://www.facebook.com/sharer/sharer.php",
    "https://twitter.com/intent/tweet",
    "https://plus.google.com/share"
  ],
  "short_name": "Asym",
  "version": "2.6.15resigned1"
}