Programmer's Calculator

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Programmer's Calculator",
  "short_name": "Programmer's Calculator",
  "description": "A programmer's calculator that supports 8, 16, 32, and 64-bit signed and unsigned numbers.",
  "version": "2.1",
  "minimum_chrome_version": "38",
  "icons": {
    "16": "assets/icon_16.png",
    "128": "assets/icon_128.png",
    "256": "assets/icon_256.png"
  },
  "app": {
    "background": {
      "scripts": [
        "background.js"
      ]
    }
  }
}