Examine source code of Calvindude

{
  "manifest_version": 2,
  "name": "Calvindude",
  "description": "Get all the updates for Automatic Screwing Machines.",
  "version": "1.1",
  "icons": {
    "192": "icon_default.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  }
}