Spotify - Map shows when two people play same song at same time
Mozilla Add-ons - Download Firefox extensions and themes. They’re like apps for your browser. They can block annoying ads, protect passwords, change browser appearance, and more.
SoundCloud - Enjoy music & follow favourite artists
Extensions switcher - Menu for quick extensions control
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
SimpleExtManager - A simple menu to enable, disable and access options of extensions.