Space

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Space",
  "description": "A fun action filled game!",
  "version": "1",
  "manifest_version": 2,
  "permissions": [
    {
      "fileSystem": [
        "directory",
        "retainEntries"
      ]
    },
    "identity",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "ShowScreen.html"
  }
}