Examine source code of VEX 4 game Basic

{
  "manifest_version": 2,
  "name": "VEX 4 game Basic",
  "version": "1.0",
  "description": "Vex 4-speletjie is 'n eenvoudige 2D-platformspeletjie waar die speler 'n stickman-karakter beheer wat hindernisse oorkom deur te spring, hardloop en meganiese lokvalle te oorkom.",
  "permissions": [],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "images/vex-logo.png"
    }
  },
  "icons": {
    "128": "images/vex-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{149b80d6-2658-4b8d-b632-6d564ac64249}"
    }
  }
}