Examine source code of LinkLocker

{
  "name": "LinkLocker",
  "description": "An encrypted link manager written with React in Typescript.",
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "icons": {
    "256": "icons/LLLogo256.png",
    "512": "icons/LLLogo512.png"
  },
  "browser_action": {
    "default_title": "LinkLocker",
    "default_popup": "index.html",
    "default_icon": {
      "48": "icons/LLLockDark48.png",
      "96": "icons/LLLockDark96.png"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Alt+C"
      }
    }
  },
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2fa27b44-6d30-45de-92c4-a0d6ccc6e444}"
    }
  }
}