Examine source code of Extension Rogueh

{
  "manifest_version": 2,
  "name": "Extension Rogueh",
  "short_name": "Rogueh: ExtRogueh",
  "version": "1.5resigned1",
  "description": "Notification Rogueh !",
  "browser_action": {
    "default_popup": "index.html"
  },
  "icons": {
    "48": "img/icon2.png"
  },
  "background": {
    "scripts": [
      "jquery-3.3.1.min.js",
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "rogueh24@gmail.com",
      "strict_min_version": "57.0"
    }
  }
}