Examine source code of Forex Calculators!

{
  "manifest_version": 2,
  "name": "Forex Calculators!",
  "version": "1.0",
  "description": "This extension gives quick access to the forex calculators",
  "homepage_url": "https://calcs.forexcalcs.com/",
  "icons": {
    "16": "images/icon_16.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png",
    "240": "images/icon_240.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "images/icon_48.png",
    "default_title": "Forex Calculators!",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "loader.js",
    "styles.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7c7b865d-3f96-4c58-9f1a-2ed6dcdb41d3}"
    }
  }
}