Examine source code of Better YouTube

{
  "name": "__MSG_appTitle__",
  "description": "__MSG_appDesc__",
  "version": "2.0.0.0",
  "default_locale": "en",
  "manifest_version": 2,
  "permissions": [
    "https://julian.gmbh/betteryt/api.php"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "worker.js"
      ]
    }
  ],
  "icons": {
    "16": "/images/Logo_x16.png",
    "32": "/images/Logo_x32.png",
    "48": "/images/Logo_x48.png",
    "128": "/images/Logo_x128.png"
  },
  "browser_action": {
    "default_popup": "donation.html",
    "default_icon": {
      "16": "/images/Logo_x16.png",
      "32": "/images/Logo_x32.png",
      "48": "/images/Logo_x48.png",
      "128": "/images/Logo_x128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{06def04e-acf1-4b24-ac1c-0e2c590bc616}"
    }
  }
}