Examine source code of GradeCam Helper

{
  "name": "GradeCam Helper",
  "browser_specific_settings": {
    "gecko": {
      "id": "gcplugin2@gradecam.com"
    }
  },
  "version": "2.4.5",
  "manifest_version": 3,
  "description": "Used in conjunction with the GradeCam plugin to enable the teacher gradebook transfer feature. See http://gradecam.com",
  "minimum_chrome_version": "88",
  "icons": {
    "128": "icon-128.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "js/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "nativeMessaging",
    "storage",
    "contextMenus"
  ]
}