Examine source code of Aspect Ratio Calculator

{
  "manifest_version": 2,
  "name": "Aspect Ratio Calculator",
  "version": "1.0",
  "description": "An aspect ratio calculator proves to be a useful tool for individuals seeking to determine the proportions of images or videos based on their width and height. Our aspect ratio calculator has a live preview option that enables users to visualize how adjustments in width and height impact the image’s aspect ratio.",
  "permissions": [],
  "browser_action": {
    "default_popup": "game.html",
    "default_icon": {
      "128": "images/cal-logo.png"
    }
  },
  "icons": {
    "128": "images/cal-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e37ef154-7617-4eb5-9b69-22a46c8d07cf}"
    }
  }
}