Internet Traffic Signal

Useful in K-12, this extension shows green if the device is Internet-connected; red, if not; yellow for only a local connection.

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Internet Traffic Signal",
  "description": "Useful in K-12, this extension shows green if the device is Internet-connected; red, if not; yellow for only a local connection.",
  "version": "3.1",
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "green.png",
    "default_title": "Internet Traffic Signal",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "http://www.google.com/",
    "https://www.google.com/"
  ]
}