Quick-add Calculating Calculator

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Quick-add Calculating Calculator",
  "version": "2.0",
  "description": "Complete simple mathematical functions quickly and easily with a click of the mouse.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "manifest_version": 2,
  "browser_action": {
    "name": "Manipulate DOM",
    "icons": [
      "off.png"
    ],
    "default_icon": "off.png",
    "default_title": "Quick-add Calculating Calculator"
  },
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "js": [
        "jquery.min.js",
        "jquery-ui.min.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ]
}