Examine source code of ShibasFixes

{
  "manifest_version": 2,
  "name": "ShibasFixes",
  "version": "1.0",
  "description": "Fixes for sites",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://slhd.smartschool.be/*"
      ],
      "js": [
        "scripts/smartschool.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a9d7f5f6-9676-4c02-ae16-e206dc2cec25}"
    }
  }
}