Examine source code of ColorDeck for Tweetdeck

{
  "name": "ColorDeck for Tweetdeck",
  "short_name": "ColorDeck",
  "manifest_version": 2,
  "version": "1.3.9.8resigned1",
  "description": "ColorDeck allows you to personalize the official web client of Twitter : Tweetdeck.",
  "default_locale": "en",
  "browser_action": {
    "default_icon": "icon_48.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "downloads",
    "https://tweetdeck.twitter.com/",
    "http://colordeck.net/*"
  ],
  "icons": {
    "16": "favicon.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "content_scripts": [
    {
      "js": [
        "jquery.js",
        "script.js"
      ],
      "css": [
        "style.css"
      ],
      "matches": [
        "https://tweetdeck.twitter.com/*"
      ]
    },
    {
      "js": [
        "jquery.js",
        "sendimg.js"
      ],
      "all_frames": true,
      "matches": [
        "http://colordeck.net/images/send.php"
      ]
    },
    {
      "js": [
        "jquery.js",
        "import.js"
      ],
      "all_frames": true,
      "matches": [
        "http://colordeck.net/extension/import.php"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_page": "options.html",
  "web_accessible_resources": [
    "css/animations.css",
    "img/spinner_large.gif",
    "css/basic.css",
    "img/spinner.gif",
    "css/stars.css",
    "fonts/stars.svg",
    "fonts/stars.ttf",
    "fonts/stars.eot",
    "fonts/stars.woff",
    "logo.png",
    "icon_48.png",
    "sounds/sound_1.mp3",
    "sounds/sound_2.mp3",
    "sounds/sound_3.mp3",
    "sounds/sound_4.mp3",
    "sounds/sound_5.mp3",
    "sounds/sound_6.mp3",
    "sounds/sound_7.mp3",
    "sounds/sound_8.mp3",
    "sounds/sound_9.mp3",
    "sounds/sound_10.mp3",
    "sounds/sound_11.mp3",
    "sounds/sound_12.mp3",
    "sounds/sound_13.mp3",
    "sounds/sound_14.mp3",
    "sounds/sound_default.mp3",
    "img/colordeck.png",
    "img/logo_badge.png"
  ],
  "applications": {
    "gecko": {
      "id": "contact@colordeck.net",
      "strict_min_version": "42.0"
    }
  }
}