This is an experimental "flag" that often results in a noticeable speed boost for large files. chrome://flags/#enable-parallel-downloading - Google Help
To download faster in Google Chrome , the most effective method is to enable , which allows the browser to split files into smaller parts and download them simultaneously. By default, Chrome typically downloads files as a single stream, but activating this hidden setting can significantly maximize your existing bandwidth. 1. Enable Parallel Downloading google download faster