Examine source code of Overlay Remover Auto

{
  "name": "Overlay Remover Auto",
  "author": "InanZen",
  "description": "Automaticaly close detected overlays.",
  "version": "1.1",
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "options_ui": {
    "page": "ora_options.html"
  },
  "background": {
    "scripts": [
      "js/ora_background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "js": [
        "js/overlay_remover.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "32": "images/jalousie_closed.svg"
    },
    "default_title": "OverlayRemoverAuto",
    "default_popup": "ora_popup.html"
  },
  "icons": {
    "128": "images/jalousie_open.svg"
  }
}