Tool for detecting and removing duplicates? [Available in 8.10.18]

FWIW, I also use Macs exclusively. I have the app installed on multiple machines, as well as the browser extensions installed (primarily use Chrome, though.) I see the duplicates everywhere: the on-page autofill list next to a field, the list from the browser extension icon, the mac apps, my iOs apps, and on. Oddly, many of the duplicates have one login item saved as item_name (username) and another version with everything the same except the (username). Not sure if that's helpful but I'm hoping so--this is getting harder to work around. I just counted and it appears I have 8 repeats of the same login item. So not just duplicates, but also octuplicates. Is it possible the Chrome browser extension is inadvertently saving logins without asking for confirmation due to a mismatch in something like http/s or the full login URL?