Examine source code of Infinite Craft memorizer

{
  "manifest_version": 2,
  "name": "Infinite Craft memorizer",
  "version": "2.5",
  "description": "A utility to remember how to get specific items in infinite craft, and create the items you want.",
  "page_action": {
    "show_matches": [
      "https://neal.fun/infinite-craft/"
    ],
    "default_title": "Open Infinite Craft Memorizer",
    "default_popup": "./index.html",
    "default_icon": {
      "19": "./icons/nodes.svg",
      "38": "./icons/nodes.svg"
    }
  },
  "background": {
    "scripts": [
      "readWebRequests.js"
    ],
    "persistent": false
  },
  "permissions": [
    "activeTab",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "webRequestFilterResponse",
    "https://neal.fun/infinite-craft/",
    "https://neal.fun/api/infinite-craft/pair"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a492b14-6518-41af-9b04-65da6841d99b}"
    }
  }
}