Examine source code of Hello, Roblox!

{
  "manifest_version": 2,
  "name": "Hello, Roblox!",
  "description": "Return the old greeting that we all missed!",
  "version": "0.2.5",
  "icons": {
    "16": "images/16.png",
    "32": "images/32.png",
    "48": "images/48.png",
    "128": "images/128.png"
  },
  "content_scripts": [
    {
      "js": [
        "main.js"
      ],
      "css": [
        "style.css"
      ],
      "matches": [
        "*://*.roblox.com/*home*"
      ]
    }
  ],
  "permissions": [
    "*://*.roblox.com/*home*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hello-roblox@dvuzu"
    }
  }
}