Examine source code of Image Zoomer

{
  "manifest_version": 2,
  "name": "Image Zoomer",
  "version": "1.0",
  "description": "Zoom images when hovering over them.",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2e5451bc-e83b-4f3f-8d0d-a7964f0f67d1}"
    }
  }
}