Examine source code of TRefresher

{
  "manifest_version": 2,
  "name": "Tab Auto Refresher",
  "version": "1.0",
  "description": "Automatically refreshes the active tab every 30 seconds. Version 1.0: Basic interval refresher.",
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Tab Auto Refresher"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{09ff7147-387d-453a-87ee-9532e2db6c68}"
    }
  }
}