Examine source code of MyEpitechPercentage

{
  "manifest_version": 3,
  "name": "MyEpitechPercentage",
  "version": "1.0.1",
  "description": "Adds percentages to my.epitech.eu",
  "icons": {
    "48": "icons/border-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@myepitechpercentage.reyshyram",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "host_permissions": [
    "*://my.epitech.eu/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://my.epitech.eu/*"
      ],
      "js": [
        "cool-percentage-plus-plus.js"
      ]
    }
  ]
}