Examine source code of Market Price Tracker

{
  "manifest_version": 2,
  "name": "Market Price Tracker",
  "version": "1.0",
  "description": "A simple tool to update and track market prices for items.",
  "permissions": [],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9f76e91b-d81a-49e7-be5a-eab0075e6f78}"
    }
  }
}