Examine source code of BTU Result Viewer

{
  "manifest_version": 3,
  "name": "BTU Result Viewer",
  "version": "1.0.0",
  "description": "Locally displays your BTU exam result after you complete BTU's own result-search process. Nothing is sent off your device.",
  "author": "Lakshit Sisodiya",
  "browser_specific_settings": {
    "gecko": {
      "id": "btu-result-viewer@local.extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://*.btuexam.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.btuexam.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "inject.js"
      ],
      "matches": [
        "*://*.btuexam.com/*"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "BTU Result Viewer",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}