@fatboy Great list!
I use ForgetMeNot for cookie management. I'd add Auto Tab Discard to the list — for those of us who like to keep a lot of tabs open, add-on makes sure only a few of them (6 in my case) remain active.
Decentraleyes already mentioned above is nice to have, LibRedirect or something similar — to automatically redirect to privacy-respecting alternatives. And of course Mozilla's own Multi-Account Containers — to keep cookies and site-data separate when you want them to be.