Examine source code of Magnify

{
  "manifest_version": 2,
  "name": "Zoomify",
  "version": "2.5",
  "description": "A simple extension that provides a better zooming experience.",
  "icons": {
    "48": "/icons/Icon2.png",
    "96": "/icons/Icon1.png"
  },
  "background": {
    "scripts": [
      "zoomify.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_style": "Zoomify",
    "default_popup": "/popup.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ]
}