30 Seconds of Knowledge - Become a better developer, in every new tab.
Privacy Badger - Privacy Badger blocks spying ads and invisible trackers. How is Privacy Badger different from Disconnect, Adblock Plus, Ghostery, and other blocking extensions?
Random User-Agent - Automatically change the user agent after specified period of time to a randomly selected one, thus...
Ghostery - Privacy tool for transparency and control
User-Agent Switcher and Manager - spoofs browser's User-Agent string.
Chameleon WebExtension - Chameleon is a Firefox extension to Spoof your browser profile.