Examine source code of Prototype

{
  "manifest_version": 2,
  "name": "Prototype",
  "version": "0.4.7",
  "description": "A scratch space for notes, links, reminders, and whatever else you want to keep around.",
  "author": "Joel Gustafson",
  "developer": {
    "name": "nDimensional Studios",
    "url": "https://ndimensional.studio/"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "homepage_url": "https://github.com/nDimensional/prototype",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png",
    "192": "icon-192.png"
  },
  "permissions": [
    "storage"
  ],
  "applications": {
    "gecko": {
      "id": "{4c6d75f6-cdad-4947-aec4-90a071b7fb81}",
      "strict_min_version": "66.0"
    }
  }
}