Examine source code of Whitenoisefy

{
  "manifest_version": 2,
  "name": "Whitenoisefy",
  "version": "1.5.0",
  "description": "White noise for you!.",
  "icons": {
    "16": "icons/icon-16.png",
    "22": "icons/icon-22.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png",
    "512": "icons/icon-512.png",
    "1024": "icons/icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "content_scripts/whitenoisefy.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon.png",
    "default_title": "Whitenoisefy",
    "default_popup": "popup/index.html"
  },
  "commands": {
    "play-white-noise": {
      "suggested_key": {
        "default": "Alt+W"
      },
      "description": "Play white noise"
    },
    "play-pink-noise": {
      "suggested_key": {
        "default": "Alt+P"
      },
      "description": "Play pink noise"
    },
    "play-brown-noise": {
      "suggested_key": {
        "default": "Alt+B"
      },
      "description": "Play brown noise"
    },
    "stop-noise": {
      "suggested_key": {
        "default": "Alt+S"
      },
      "description": "Stop noise"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{38949414-f0b1-4873-bfe1-23ec393fb98f}"
    }
  }
}