Privacy Badger - Privacy Badger blocks spying ads and invisible trackers. How is Privacy Badger different from Disconnect, Adblock Plus, Ghostery, and other blocking extensions?
Secateur - Use Secateur if you want to temporarily or permanently block or mute (or both block and mute) a Twitter account and all its followers.
uMatrix - uMatrix: A point-and-click matrix-based firewall, with many privacy-enhancing tools.
Twitter One Click Block - Add a block button for a simple one click blocking.
Ghostery - Privacy tool for transparency and control
BlockParty - Real-time voice chat rooms from the creators of turntable.fm