FBReader has a "Web" tab under options (cross toools icon). Its only option on some devices is "Open External Links in Default Browser". This will probably be on by default, and any device with a default browser should be able to use the guide via FBReader.
On the iLiad (FBReader version 0.8.04) the Web tab option is "open external links in Browser", and if you check it you then need to enter the command to use (since there is no default browser). I have not tried to get this to work, but the command would typically have to include an automatic connection to WiFi. The best bet might be a script using wget. The iLiad also has MobiPocket Reader, but it does not support web access.