Examine source code of Remove Spiceworks Adverts

{
  "manifest_version": 2,
  "name": "Remove Spiceworks Adverts",
  "version": "1.4",
  "description": "Remove adverts from Spiceworks & show full width ticket list. Developed by: MartyG",
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "*://on.spiceworks.com/*"
      ],
      "css": [
        "content.css"
      ],
      "all_frames": true
    }
  ],
  "icons": {
    "16": "img/logo-16.png",
    "32": "img/logo-32.png",
    "48": "img/logo-48.png",
    "128": "img/logo-128.png"
  }
}