I use CookieAutodelete on my mobile because unfortunately the container API isn't available on the Android version of Firefox.
The reason I don't use it on my desktop is because there are certain types of things that cannot be cleared.
> APIs do not exist to allow clearing IndexedDB, Service Workers cache, appCache, or cache by host. Clearing cookies & localStorage on their own, and leaving orphaned persistent data is a false sense of privacy.
* CanvasBlocker https://addons.mozilla.org/en-US/firefox/addon/canvasblocker...
* Cookie AutoDelete https://addons.mozilla.org/en-US/firefox/addon/cookie-autode...
and I block cookies by default using uMatrix.
Thanks for pointing out CSS Exfil Protection. I hadn't seen that one yet.
Edit: I also recently switched to NoHTTP instead of HTTPS-Everywhere. This way I have to explicitly allow any non-HTTPS connections.