Examine source code of PipeSoundEffect

{
  "manifest_version": 2,
  "name": "PipeSoundEffect",
  "version": "1.0",
  "description": "plays the funny",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "/pipe.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "sounds/*"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "PipeSoundEffect@example.org",
      "strict_min_version": "88.0"
    }
  }
}