Let it snow!

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Let it snow!",
  "description": "More snow in your browser!",
  "version": "1.0.3",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_icon": "icons/icon32.png",
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self' https://ajax.googleapis.com https://ssl.google-analytics.com 'unsafe-eval'; object-src 'self'",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "scripts/contentscripts/snow.js"
      ]
    }
  ]
}