Google Page Cumstom Background

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Google Page Cumstom Background",
  "description": "Replacing boring default background to random hi-def images",
  "version": "0.0.1",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.google.com/",
        "http://www.google.com/"
      ],
      "css": [
        "bg.css"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "page_action": {
    "default_title": "Custom Google background"
  }
}