This browser does not enable isolation of connections by domain or by browser tab. This means that your identity is the same in every browser tab you are using. If a person owns two sites, and you visit both of those sites at the same time, it is possible for them to know. Keep this in mind when you browse I2P.
Click HERE to open I2P router console.
It can take 10-15 minutes until I2P is fully connected and eepsites (.i2p) are accessible. See also Whonix documentation on I2p.. (Link needs to be opened in Tor Browser.)
This Unofficial I2P Browser (by Whonix, not I2P developers) is based on Tor Browser in order to take advantage of the hardening/attack surface reduction/settings management done by the Tor Browser.