Examine source code of HatBlocker

{
  "manifest_version": 2,
  "name": "HatBlocker",
  "version": "1.6",
  "description": "Block your ads and be safe!",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "list.js"
    ]
  },
  "icons": {
    "16": "icons/orange1616.png",
    "48": "icons/orange4848.png",
    "128": "icons/orange128128.png"
  }
}