Examine source code of EZ PoE Trade

{
  "manifest_version": 2,
  "name": "EZ PoE Trade",
  "version": "1.1",
  "description": "A minimal PoE Trade extension.",
  "sidebar_action": {
    "default_title": "EZ PoE Trade",
    "default_panel": "sidebar.html"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Open EZ PoE Trade"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ce7d108-037b-427c-9ee6-67e02dc3efad}"
    }
  }
}