Accurate Ruler

Use this ruler to measure things on your screen. You can calibrate the ruler to ensure accuracy.

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manifest.json

{
  "update_url": "http://clients2.google.com/service/update2/crx",
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "offline_enabled": true,
  "default_locale": "en",
  "version": "5.8.8",
  "icons": {
    "128": "ruler_128.gif"
  },
  "app": {
    "urls": [
      "https://www.freeonlineruler.com/"
    ],
    "launch": {
      "web_url": "https://www.freeonlineruler.com/?cws=1"
    }
  },
  "permissions": [
    "unlimitedStorage",
    "notifications"
  ],
  "manifest_version": 2
}