All these browser plugins work in Firefox, some also in Chrome/Chromium
Beginners
– HTTPS Everywhere: Enables HTTPS by default on many websites,
straightforward and very easy to use (you basically forget about it)
Also available for Chrome, Firefox for Android & Opera.
More info about HTTPS Everywhere & Tor here
– Ublock Origin: Blocks a huge amount of ads, same, you just forget
about it and never want to use a browser without it again.
It is available for Firefox, Chrome, Safari
– Privacy Badger: Also available for Chrome
– Terms of Service; Didn’t Read: a user rights initiative to rate and label website terms & privacy policies, from very good Class A to very bad Class E. Add-on/extension for Firefox, Chrome, Safari & Opera with Internet Explorer to come
Intermediate
– Lightbeam: a Firefox add-on that uses interactive visualizations to show you the first and third party sites you interact with on the Web. As you browse, Lightbeam reveals the full depth of the Web today, including parts that are not transparent to the average user.
Advanced
– NoScript: Blocks javascripts by default, breaks most of the web2.0
websites, the user needs to know what they are doing.
Tor Browser Launcher
To install in an Ubuntu-based distribution
https://github.com/micahflee/torbrowser-launcher
Obfuscation
– AdNauseam: a browser extension designed to obfuscate browsing data and protect users from surveillance and tracking by advertising networks.