I think the only thing that's missing is allowing the containers to sync with Firefox Sync with a client-side passphrase. I don't want to lose all of that "work" I've put into carefully separating websites into their own containers when I switch to another machine or re-install the OS, etc.

Also, it should be easy to "reset and switch" a website from one container into another while leaving no traces that it's been in another container. I often load a website in no container or in another container, and then I use another plugin to switched it to where it should be. This should be a default feature.

Yep this is actually a killer feature for development and more than makes up for the polish difference in dev tools imo.

The irony is strong.

I'm still not happy with how AMP operates. Seems like it will mess up the interwebs. Something on IPFS along with tighter usage of compression and markup compliance is likely a better solution than AMP.