Oh my fucking god, I’ve been using qbit and never went beyond setting up the barebones basic. Thanks a lot for talking about this feature!

For anyone interested, it’s in the View menu -> Search Engine (should be 5th option). It’ll ask to install Python if you don’t have it already.

After that, you should see a new tab on the upper left: Transfers / Search. On the bottom right, click the “Search plugins” to let it download/install some. Presto!