The Download Accelerator Conundrum
Google Chrome includes an experimental feature called “Parallel Downloading.” When enabled, Chrome takes large file downloads and splits them into multiple smaller chunks. It then opens several simultaneous network connections to the server to download those chunks at the same time, before stitching them back together at the end. This acts like a built-in download accelerator and can significantly speed up the download of large files (like ISO images or video files) on fast broadband connections.
However, parallel downloading is not always perfect. Some older, legacy web servers, or heavily restricted corporate firewalls, view multiple simultaneous connections from the same IP address as a Denial of Service (DoS) attack and will automatically block your download, causing it to fail halfway through. If you frequently experience corrupted downloads, “Network Error” interruptions, or downloads that simply freeze, you should try disabling parallel downloading to force a single, stable connection.
How to Disable Parallel Downloading
You must access Chrome’s experimental flags menu to turn off this feature.
- Open Google Chrome.
- Click inside the main address bar at the top of the browser.
- Type
chrome://flagsand press Enter. - A page titled “Experiments” will load.
- In the search bar at the top, type Parallel downloading.
- The specific flag will appear highlighted in yellow. Next to it is a dropdown menu, likely set to “Default” (which currently enables it on most platforms).
- Click the dropdown menu and select Disabled.
- Chrome will prompt you to restart the browser for the change to take effect. Click the blue Relaunch button.
Chrome will now revert to the traditional method of downloading files using a single, sequential network connection, which is often slower but significantly more stable when dealing with restrictive servers.