Examine source code of Timestamp Copier Popup

{
  "manifest_version": 2,
  "name": "Timestamp Copier Popup",
  "version": "1.0",
  "description": "Copy the current timestamp to clipboard with one click.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png",
    "default_title": "Timestamp Copier"
  },
  "permissions": [],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cda5d00f-16de-483f-8bdc-3fd0d57435d3}"
    }
  }
}