Examine source code of FastClassPass

{
  "manifest_version": 2,
  "name": "FastClassPass Grade Syncer",
  "version": "1.9",
  "description": "Triggers backend when grades are saved in Google Classroom.",
  "permissions": [
    "notifications",
    "https://classroom.google.com/*",
    "https://sis.reverek12.org/*"
  ],
  "icons": {
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "https://classroom.google.com/*",
        "https://sis.reverek12.org/*"
      ],
      "js": [
        "content.bundle.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "icon.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "fastclasspass@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}