Examine source code of Scry One

{
  "manifest_version": 2,
  "name": "Scry One",
  "version": "0.1.0",
  "author": "John Athanasiou",
  "homepage_url": "https://github.com/jathanasiou/ScryOne",
  "description": "Redirect all card-specific page visits/clicks from the MTG Gatherer to the Scryfall website",
  "browser_action": {
    "default_icon": {
      "32": "icons/scryone-48.png"
    },
    "default_title": "Scry One",
    "default_popup": "popup/index.html"
  },
  "icons": {
    "48": "icons/scryone-48.png",
    "64": "icons/scryone-64.png",
    "96": "icons/scryone-96.png",
    "128": "icons/scryone-128.png"
  },
  "permissions": [
    "*://gatherer.wizards.com/*",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  }
}