Examine source code of Study Capture

{
  "manifest_version": 3,
  "name": "Study Capture",
  "version": "1.0.4",
  "description": "Capture webpage screenshots for study. Save as PNG, single-page PDF, or assemble a multi-page study book.",
  "action": {
    "default_title": "Study Capture",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "alarms",
    "activeTab",
    "tabs",
    "storage",
    "downloads",
    "downloads.open",
    "unlimitedStorage",
    "scripting"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.studycapture.co/*",
        "https://studycapture.co/*"
      ],
      "js": [
        "web-handoff.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "externally_connectable": {
    "matches": [
      "https://studycapture.co/*",
      "https://www.studycapture.co/*"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "study-capture@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "authenticationInfo"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}