Examine source code of Export Memrise Progress

{
  "description": "Export your progress on a Memrise community course. ",
  "manifest_version": 3,
  "name": "Memrise Community Course Progress Exporter",
  "version": "1.13",
  "icons": {
    "16": "icons/16x16.png",
    "32": "icons/32x32.png",
    "48": "icons/48x48.png",
    "96": "icons/96x96.png",
    "128": "icons/128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e84320b4-beae-4c75-8e20-fcf292e07576}"
    }
  },
  "host_permissions": [
    "https://community-courses.memrise.com/*",
    "https://app.memrise.com/*"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://community-courses.memrise.com/community/course/*",
        "https://app.memrise.com/community/course/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ]
}