You May Know Them From (MDL) by David

A browser extension for MyDramaList that shows on the top of the page where you've seen an actor, director, writer or other credited person before - based on your own MDL list!

❓ Ever had this moment:
"I know this actor from somewhere... but, from where?!"

Instead of scrolling through a full filmography and trying to remember where you have seen them before, this extension answers that instantly! By comparing a person's credits with the titles saved from your own synced MyDramaList account, get the answer fast: if you've already logged a drama, movie or tv show they've appeared in (or had a staff role), you will see the match immediately!
note: if you don't want to see staff roles, you can disable it on settings!

Add it to your Firefox, sync your MDL's account username on the extension's popup and now, every time you open up any person's page, you'll get a banner at the top that tells you where you know them from! You can also open a "Show More" modal with more details about those titles!