According to the update at Invisible Internet Project (I2P)
Update:
Accessing i2p’s webinterface on 127.0.0.1 using Tor Browser is no longer possible due to a change in Tor Browser by The Tor Project. You could set to transparent torification, but then you would be vulnerable fingerprinting issues. See ticket for more.
and to what I just tried, the config page can’t be accessed anymore.
Is setting to transparent torification the only option, and what does it mean? How do we do it?
Once it’s configured can we turn it back?
I don’t think unsafe browser is appropriate vocabulary here.
As far as someone (me) shared it’s knowledge, yes.
The short answer is, don’t do it for security reasons.
The long answer is:
no one documented the real implications in user understandable way yet. Technical details can be found by understanding this ticket:
Does it mean we don't go through tor if we do that?
Anything started from Whonix-Workstation always goes through Tor.
“At the moment” → seems rather permanent unless someone contributes by understanding and fixing this issue.
If “no go” applies is difficult to say. You can poke around with Tor Button’s proxy settings or use Iceweasel. Do I recommend it? No. Would be pseudonymous rather than anonymous.
With the risk to be pain in the ass, I’m not sure what exactly we are risking if we do that with the proxy settings.
Our Tor identity can be related to our i2p one or there is more to that?