Examine source code of Blackboard +

{
  "name": "Blackboard +",
  "description": "Dark mode, Custom themes, Custom courses, and fonts for Blackboard.",
  "version": "1.0.0",
  "manifest_version": 2,
  "icons": {
    "48": "icons/BbOrangeGradient48.png"
  },
  "permissions": [
    "storage",
    "*://*.blackboard.com/*",
    "*://blackboard.towson.edu/*"
  ],
  "browser_action": {
    "default_title": "Blackboard +",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.blackboard.com/*",
        "*://blackboard.towson.edu/*"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "blackboardplus@abelberhanuu",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}