Examine source code of Excalistore

{
  "manifest_version": 3,
  "name": "Excalistore",
  "description": "Store multiple excalidraw diagrams in the browser cache.",
  "version": "1.2.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{43af7405-9dc5-422d-b499-8582857d2742}"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "js": [
        "assets/script.js"
      ],
      "matches": [
        "https://excalidraw.com/*"
      ]
    }
  ],
  "action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "storage",
    "unlimitedStorage"
  ]
}