Examine source code of MathFlow Express

{
  "manifest_version": 2,
  "name": "MathFlow Express",
  "version": "1.0.0",
  "description": "Lightning-fast mathematical calculations, smart unit conversions, and expression evaluations in an elegant popup interface.",
  "permissions": [],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "MathFlow Express",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eaf6dec3-3882-4024-9122-54f2ba4ea29c}"
    }
  }
}