Examine source code of Highfall

{
  "manifest_version": 3,
  "name": "Highfall",
  "description": "A web extension for displaying Canadian Highlander details on Scryfall",
  "version": "0.1.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://scryfall.com/card/*",
        "https://scryfall.com/search?*&as=full*",
        "https://scryfall.com/search?as=full&*"
      ],
      "css": [
        "content.css"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ad27656a-fe63-4736-b43d-aa8da7bf0908}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "58.0"
    }
  }
}