Examine source code of Xdebug Starter

{
  "manifest_version": 2,
  "name": "Xdebug Starter",
  "version": "1.1.2resigned1",
  "description": "A Firefox extension that allows you to start the debugging session with one click. Icon made by Dave Gandy from www.flaticon.com.",
  "permissions": [
    "<all_urls>",
    "tabs",
    "cookies",
    "storage",
    "webRequest"
  ],
  "icons": {
    "96": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/icon128.png",
    "default_title": "Xdebug Starter",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{abfc19d6-cde3-453a-946d-0a38aed9c90d}"
    }
  }
}