Twitter #Stargate: Heart -> Star

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Twitter #Stargate: Heart -> Star",
  "version": "1.0.0",
  "manifest_version": 2,
  "description": "Twinkle, twinkle little star.",
  "content_scripts": [
    {
      "matches": [
        "http://twitter.com/*",
        "https://twitter.com/*",
        "http://www.twitter.com/*",
        "https://www.twitter.com/*"
      ],
      "css": [
        "css/stargate.css"
      ],
      "js": [
        "js/stargate.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "web_accessible_resources": [
    "js/*",
    "images/*"
  ]
}