Cookie Manager - This Cookie Manager allows you to quickly view and edit specific cookies.
The Security Checklist - The Practical Security Checklist for Web Developers
Cookiebro - With Cookiebro you can manage/filter/block browser cookies that can be used to track you online.
iCompaas - Cloud infrastructure Compliance, CyberSecurity and Cost Saving as-a-Service
Cookie Quick Manager - An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.
Gold Fig - Version control for settings pages