spoiler-alert

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "spoiler-alert",
  "short_name": "spoiler alert",
  "version": "1.2",
  "description": "An extension to prevent you from getting unwanted spoilers on social networking websites.",
  "author": "Vishnu Narang",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://google.com/*",
        "https://google.com/*",
        "https://www.facebook.com/*",
        "https://twitter.com/*"
      ],
      "css": [
        "my-spoil.css"
      ],
      "js": [
        "got-data.js",
        "my-spoil.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "128": "images/spoiler-alert-icon-128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "https://ajax.googleapis.com/"
  ]
}