Examine source code of Study+

{
  "manifest_version": 2,
  "name": "Grade",
  "version": "0.2",
  "description": "A firefox extension that calculates a student average and makes predictions in MBN.",
  "content_scripts": [
    {
      "matches": [
        "*://*.monbureaunumerique.fr/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{59d183fe-c324-4a79-be9c-d6f4d25af0b4}"
    }
  }
}