doubled

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "doubled",
  "description": "Create amazing double exposed photographs.",
  "version": "0.17",
  "offline_enabled": true,
  "app": {
    "background": {
      "scripts": [
        "background.js"
      ]
    }
  },
  "icons": {
    "128": "icon-128.png"
  },
  "permissions": [
    {
      "fileSystem": [
        "write"
      ]
    },
    "storage",
    "<all_urls>"
  ]
}