I've got the extension up and running, but that doesn't seem to do the trick. I reset my proxy settings every time I try to connect (I can't connect to the internet normally if I use i2p proxy settings, and can't connect to i2P if I don't); i don't recall off the top of my head if FoxyProxy worked correctly for me or not.
I will check out the thread on wizanons.de and see if that helps at all.
Fun fact: you can be opposed to capitalism without being a communist.
You [tankies] maybe opposed to capitalism, but you're still in favor of the coercive control of individuals by a state-level entity. That's just another flavor of authoritarianism.