Examine source code of Scryfall Clipboard Plus

{
  "manifest_version": 2,
  "name": "Scryfall Clipboard (+)",
  "version": "0.6.0",
  "description": "Adds a (+) save button to Scryfall grid, a clipboard drawer, and an EDHREC salt badge.",
  "browser_specific_settings": {
    "gecko": {
      "id": "scryfall-clipboard-salt@Milk_Dunker.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "https://api.scryfall.com/*",
    "https://edhrec.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://scryfall.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "css": [
        "content-style.css"
      ],
      "run_at": "document_idle"
    }
  ]
}