Examine source code of JavaScript Toggle

{
  "manifest_version": 2,
  "name": "JavaScript Toggle",
  "version": "1.0",
  "description": "Toggle JavaScript execution on the current webpage.",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/js-toggle-48.png",
    "default_popup": "popup.html",
    "default_title": "Toggle JavaScript"
  },
  "icons": {
    "48": "icons/js-toggle-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{74543c91-5c37-4f72-aeac-57dc50dc6df3}"
    }
  }
}