Summary:
Love it. Easy. Automated. Confusing Blue Color.

Strength:
• Open source. If you are not familiar with "open source", it means this app is more secure. Because its code is publicly available for review and contributions on GitHub at https://github.com/Cookie-AutoDelete/Cookie-AutoDelete
• Attractive MIT License. This means the software code of this add-on app is owned and supported by a friendly not-for-profit community. Instead of a for-profit corporation. And more secure because its full code is publicly available for review.
• Easy to use. Using the button in the browser toolbar.
• Whitelist cookies. Very easy. Two clicks to whitelist a website.
• Frequent add-on updates
• “Automatic Cleaning” allow you to optionally automatically delete cookies from closed tabs after a set delay
• Export or import your whitelist of cookies expressions/rules
• Well documented
• Works with Firefox 52 or more recent
• Available for both Firefox/Tor Browser and Chromium/Chrome
_____• https://addons.mozilla.org/en-US/firefox/addon/cookie-autodelete/
_____• https://chrome.google.com/webstore/detail/cookie-autodelete/fhcgjolkccmbidfldomjliifgaodjagh
• Internationalization (i18n)
• Many more features

Challenge:
• The color of the toolbar icon for whitelisted websites is blue. Which is confusing at start. Because for most extensions the color green is use for whitelisted websites. But after this initial learning curve, the user interface works fine.
• Can not edit cookies. But this can be done with other extensions which focused on software engineer and testing.

Using:
• Extension 2.2.0
• Firefox 52 (64-bit)
• Tor Browser 52 (64-bit)
• Debian 8 Jessie 64-bit
• GNOME 3.14.1