These are links to two Github issues showing unexpected trouble handling the package.json value browser: { buffer: false }:

• Error processing dependency package.json files aurelia/webpack-plugin#12
• Incompatible with js-yaml nexe/nexe#148 (comment)

Here is documentation I could find on the browser property, or the lack thereof:

• https://github.com/defunctzombie/package-browser-field-spec
• https://docs.npmjs.com/files/package.json (no browser property mentioned)

Is { buffer: false } a documented value?