ethers.js/lib.commonjs/package.json

{
  "browser": {
    "./crypto/crypto.js": "./crypto/crypto-browser.js",
    "./providers/provider-ipcsocket.js": "./providers/provider-ipcsocket-browser.js",
    "./providers/ws.js": "./providers/ws-browser.js",
    "./utils/base64.js": "./utils/base64-browser.js",
    "./utils/geturl.js": "./utils/geturl-browser.js",
    "./wordlists/wordlists.js": "./wordlists/wordlists-browser.js"
  },
  "sideEffects": false,
  "type": "commonjs"
}