I just uploaded version 1.0 of the CCK2 to AMO. Until it is approved, you can get it here.
I decided that while I was getting some feedback, I'd get more if I just released it. It's not a polished as I wanted, but it's working in all my testing.
The main feature that didn't make it is preventing click to play for individual plugins. I did add a feature that allows you to enable all plugins for a given domain, even in current versions of Firefox.
Please let me know what you think. I feel like I've addressed a lot of the feedback I've received over the years.
Thanks for your support.