Examine source code of CleanTube

{
  "manifest_version": 2,
  "name": "CleanTube",
  "version": "0.6",
  "description": "YouTube with less clutter.",
  "author": "Elliot Waite",
  "icons": {
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": "icon128.png",
    "default_title": "Options",
    "default_popup": "options.html"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": false
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.youtube-nocookie.com/*"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "*://*.youtube.com/*",
    "*://*.youtube-nocookie.com/*",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{080a636f-b3ee-4e4c-b7ce-0eda7ee95868}"
    }
  }
}