Examine source code of Soundcloud Download

{
  "manifest_version": 2,
  "name": "Soundcloud Download",
  "description": "This extension will let you download any track from Soundcloud.",
  "version": "0.3.8",
  "content_scripts": [
    {
      "matches": [
        "https://*.soundcloud.com/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "browser-id3-writer.js",
      "crunker.js",
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "assets/icon.png",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "assets/icon.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "permissions": [
    "https://*.soundcloud.com/*",
    "tabs",
    "webRequest",
    "downloads",
    "webNavigation",
    "storage"
  ],
  "web_accessible_resources": [
    "assets/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c7e16e0-d027-48ee-a9b4-97abaf51b8fd}"
    }
  }
}