Rotate

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Rotate",
  "description": "This extensions messes with your head",
  "version": "1.1",
  "permissions": [
    "activeTab",
    "https://ajax.googleapis.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "yourcss.css"
      ]
    }
  ]
}