Examine source code of Matrix Rain

{
  "manifest_version": 2,
  "name": "Matrix",
  "version": "0.0.1",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "p5.min.js",
        "sketch.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_title": "Matrix Rain",
    "default_icon": "icon32.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{abb562e8-8ef4-4d94-ab38-d8490a0fd59d}"
    }
  }
}