Examine source code of FXN Wiki

{
  "manifest_version": 2,
  "name": "FXN Wiki",
  "version": "1.6resigned1",
  "description": "Fast and easy access to wikipedia data. Select one or two words on any website, it will open window with wikipedia information about the request.",
  "homepage_url": "https://find-xss.net",
  "icons": {
    "64": "icons/icon-64.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "fxnwiki.js"
      ]
    }
  ],
  "applications": {
    "gecko": {
      "id": "{bb9b7104-4b1e-44c7-9a17-5ec051b6f220}"
    }
  }
}