Examine source code of Art Search

{
  "manifest_version": 2,
  "name": "Art Search",
  "description": "Help users make their art research faster and more easily from the same browser extension.",
  "version": "0.4",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ]
}