Calculator+

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Calculator+",
  "description": "A simple calculator extension for chrome, designed to help you make quick and efficient calculations on the fly.",
  "version": "1.0",
  "author": "Matas Kairaitis",
  "browser_action": {
    "default_title": "Calculator+",
    "default_icon": "images/icon.png",
    "default_popup": "calculator.html"
  },
  "sandbox": {
    "pages": [
      "sandbox.html"
    ]
  }
}