Calculator Button

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Calculator Button",
  "description": "My Online Calculator Button",
  "manifest_version": 2,
  "version": "1.0",
  "background": {
    "page": "index.html"
  },
  "icons": {
    "128": "clock.png"
  },
  "browser_action": {},
  "web_accessible_resources": [
    "clock.png",
    "clock_16.png",
    "js.js",
    "style.css"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'unsafe-eval';"
}