Ah, that explains a lot. This looks useful because I often have an itchy trigger finger and download more than one copy. But you know what I really miss in Chrome would be a decent download manager that lets me select multiple files from one page instead of DLing them one at a time. Last time I looked the only extension for this practically announced itself as malware.
Funnily enough, this extension exists as a sample extension in the Chrome extension docs. Apparently, you can't link to specific samples, so just go to https://developer.chrome.com/dev/extensions/samples.html and filter by "downloads." The extension you're looking for is "Download Selected Links."
Oh don't worry about it. Kinda saw it coming as I had that problem before. And that's great! Been meaning to switch to the dev channel for a while now.