Examine source code of Desmos Text I/O

{
  "name": "Desmos Text I/O",
  "description": "import/export Desmos graphs as text (json).",
  "version": "1.2.2",
  "manifest_version": 3,
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2904c92e-079c-424b-bcd4-e1d4ae624249}"
    }
  },
  "content_scripts": [
    {
      "js": [
        "content.bundle.js"
      ],
      "matches": [
        "https://www.desmos.com/*"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "injected.js"
      ],
      "matches": [
        "https://*/*"
      ]
    }
  ]
}