Examine source code of FoxholeHQ

{
  "manifest_version": 2,
  "name": "FoxholeHQ",
  "version": "1.21",
  "description": "A Foxhole tool that connects to FoxholeHQ to get the latest Foxhole Statistics and War Information.",
  "icons": {
    "16": "icons/16x16.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "permissions": [
    "storage",
    "https://foxholehq.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "foxholehq.html",
    "default_icon": {
      "16": "icons/16x16.png",
      "48": "icons/48x48.png",
      "128": "icons/128x128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{74544620-c530-42ad-8d5b-1862db8c08e7}"
    }
  }
}