Unit conversion tool

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Unit conversion tool",
  "icons": {
    "48": "icons/wrench.png",
    "96": "icons/wrench.png"
  },
  "options_page": "options.html",
  "options_ui": {
    "chrome_style": true,
    "page": "options.html"
  },
  "description": "Unit Conversion",
  "version": "0.7",
  "permissions": [
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "unitconversion.js"
    ]
  },
  "manifest_version": 2
}