Examine source code of Better Neverthink.tv

{
  "manifest_version": 2,
  "name": "Better Neverthink.tv",
  "version": "1.0.0",
  "author": "p8tgames",
  "description": "Removes the obnoxious splash screen from Neverthink.tv",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "https://neverthink.tv/"
      ]
    }
  ]
}