The music streaming service Spotify is terribly designed in a multitude of ways, but there is one aspect that is a special level of shitty:
The keyboard shortcut to put caret focus in the search field is Cmd/Ctrl-L.
Seriously… What. The. Fuck.
Meanwhile, the obvious and logical shortcut Cmd/Ctrl-F is mapped to the menu item Edit > Filter which has no function. You can slap Cmd-F on every page on Spotify and nothing will ever happen.