How to integrate Spotify into Last.fm (Firefox)

Trick to get direct links to Spotify searches from the Last.fm web page (very useful for e.g. your personal recommendations):

1. Install Greasemonkey: https://addons.mozilla.org/en-US/firefox/addon/748
2. Install this script: http://emil.hesslow.se/spotify/spotify__lastfm.user.js

Note the little green notes you now get next to artists, albums etc.