Essential add-ons for everyday security. Also, use startpage dot com, and Privacy Badger from EFF dot org. For special privacy (against governments), use Torbrowser instead. X = Experts only.
A collection of lightly-coloured, clean (not-too-busy) personas I use (in rotation with the Personas Rotator add-on).
If you don't use search suggestions, simple bookmarks with keywords are better because you can force HTTPS and you don't have to install them. Recommended for your default search engine: Startpage.
Add-ons which fix bugs, improve security, or add functionality that should be included in Firefox by default. See also my collections "privacy essentials", "functionality" and "newbie-suitable".
My favourite add-ons, purely for aesthetics. I also recommend my collections "bugfixes", "functionality" and "privacy essentials".
My favourite add-ons to extend Firefox's functionality. See also my collections "bugfixes", "privacy essentials", "newbie-suitable" and "pretty". X = may not be worth slowdown.