manifest.json

 {
  "manifest_version": 2,
  "name": "HypeMachine Extension",
  "version": "1.44",
  "description": "Adds a download button to the HypeMachine page, making downloading songs simpler.",
  "web_accessible_resources": ["hypestyles.css"],
  "background": {
    "page": "background.html"
  },
  "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",
  "homepage_url": "http://fzakaria.com",
  "icons": {
    "48": "./images/hype48.jpeg",
    "128": "./images/hype128.png"
  },
  "permissions": ["tabs", "http://*/", "https://*/"],
  "content_scripts":[
  {
	"matches": ["http://hypem.com/*", "https://hypem.com/*"], 
	"css": ["hypestyles.css"],
	"js": ["extension.js"],
	"run_at": "document_end"
  }
  ]
}