Find in npm module mongodb:
..\node_modules\mongodb\node_modules\bson\ext\index.js
Change path to js version in catch block:
bson = require('../build/Release/bson');
To:
bson = require('../browser_build/bson');
Or copy file in:
..\node_modules\bson\build\Release\bson
From:
..\node_modules\bson\browser_build\bson