Examine source code of Hive Profile Extension

{
  "manifest_version": 2,
  "name": "Hive Profile Finder",
  "version": "1.3",
  "description": "Quickly open a Hive profile by entering a Minecraft username.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "hive-logo.png",
      "48": "hive-logo.png",
      "128": "hive-logo.png"
    }
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{96a37a88-fe5e-4aef-b388-210207afc693}"
    }
  }
}