Examine source code of Scryfall Card Search

{
  "manifest_version": 2,
  "name": "Scryfall Card Search",
  "description": "To use, type '!scry' plus a search term into the url bar.",
  "version": "1.0",
  "homepage_url": "https://github.com/Julian-Zipper/firefox-scryfall-search-extension",
  "icons": {
    "48": "icons/icon.png",
    "96": "icons/icon2x.png"
  },
  "omnibox": {
    "keyword": "!scry"
  },
  "permissions": [
    "*://scryfall.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}