Examine source code of Web Call and Chat

{
  "manifest_version": 2,
  "version": "0.1.1resigned1",
  "name": "Web Call and Chat",
  "description": "Access to Skype's official Web messenger in a standalone sandboxed window",
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png"
  },
  "homepage_url": "http://add0n.com/skype-web.html",
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_icon": {
      "16": "data/icons/16.png",
      "32": "data/icons/32.png",
      "48": "data/icons/48.png",
      "64": "data/icons/64.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://web.skype.com/*",
        "*://preview.web.skype.com/*"
      ],
      "js": [
        "data/inject.js"
      ],
      "css": [
        "data/inject.css"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "data/window/home.svg",
    "data/window/reload.svg",
    "data/window/settings.svg"
  ],
  "options_ui": {
    "page": "data/options/index.html",
    "chrome_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e7bc2744-70c9-48bf-9e8f-c937ba1e54ab}"
    }
  }
}