Examine source code of ILovePDF Toolkit

{
  "manifest_version": 2,
  "name": "ILovePDF Toolkit",
  "version": "2.0",
  "description": "Quick access to ILovePDF tools like Merge, Split, Compress and more.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_popup": "popup.html",
    "default_title": "ILovePDF Toolkit"
  },
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3af3c6fe-624c-4214-a2ba-dfe8f04e1a30}"
    }
  }
}