UPDATE to UPDATE: found the culprit, and it wasn't this add-on.

I am a really bad tab collector, because it takes far far too long to Ctrl-D, add tags, and save (NOT!). Dustman is good incentive to do the necessary work.

It's missing a counter on the icon which indicates the number of binned tabs though as sort of an indicator to do something; a notification popup is not necessary but .. some might want it. I could also use a restore-all options from the bin - the default bins tabs from 20 minutes old, and delete them when you exit. If you have a significant number of tabs open when you install it you will lose almost all of them when you close the browser.

Pretty good but I would like to see a whitelist in a future update.