Display your Last.fm scrobbles on your Google Maps Timeline. Because it's fun to see what you listened to where!
So, you're using Last.fm, and sometimes look back and check what you listened in the past? And you're also using Google Maps Timeline, and you sometimes look back and check where you were on a certain day? Well, now you can do both at the same time, as this extension will display your scrobbles right in the Timeline. It's not terribly useful, but it's fun! And it may help you remember feelings, details, little minutae of your life you wouldn't otherwise. Lifelogging is fun, and somewhat good for self-reflection. And may be a slippery slope into horrible bouts of nostalgia.
Set your Last.fm user in the settings after installation: no login is required, but your scrobbles will only be shown if you've set your recent listening information to public (on Last.fm go to Settings -> Privacy, and uncheck "Hide recent listening information").