Days Since (Days Count)

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Days Since (Days Count)",
  "short_name": "Days Since",
  "version": "1.1",
  "description": "Displays the number of days since a specified date right in the toolbar. (Days Count)",
  "permissions": [
    "storage"
  ],
  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",
  "browser_action": {
    "default_title": "Click here to set the date",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}