Examine source code of Spotify Playlist Builder

{
  "manifest_version": 3,
  "name": "Spotify Playlist Builder",
  "short_name": "Spotty",
  "description": "Generate a random playlist from everything stored in My Library, including liked tracks, albums and playlists.",
  "version": "0.3.3",
  "author": "@rimutaka",
  "action": {
    "default_title": "Adds a random selection from My Library to a playlist. Activates on a new Spotify playlist page.",
    "default_icon": {
      "16": "assets/toolbar_icon_19.png",
      "19": "assets/toolbar_icon_19.png",
      "32": "assets/toolbar_icon_19.png",
      "38": "assets/toolbar_icon_38.png"
    },
    "default_popup": "js/popup.html"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';"
  },
  "background": {
    "type": "module",
    "scripts": [
      "js/background.js"
    ]
  },
  "permissions": [
    "webRequest"
  ],
  "host_permissions": [
    "*://*.spotify.com/*"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "js/wasm/wasm_mod.js",
        "js/wasm/wasm_mod_bg.wasm"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{aed20410-8c19-4833-aa70-42223e29c364}",
      "strict_min_version": "112.0"
    }
  }
}