I have the same problem, already installed gnome-python2-extras, gnome-phyton2-gtkmozembed and all data providers and the help->developer menu shows blank pages. No errors are indicated in the console.

Do you have a web proxy?

*** This bug has been marked as a duplicate of 514649 ***

No, there is no proxy so it shouldn't be a duplicated, I did find out at this moment that the problem was in the gnome-phyton2-gtkmozembed rpm for fedora, the library was compiled with xulrunner and not with firefox, so as workaround I change the script /usr/bin/conduit and replace the search for /usr/lib*/firefox* for /usr/lib*/xulrunner* and it start to work as it should.

Ah OK. This is a real pain. We will be moving to webkit for the GNOME 2.24 release, so hopefully all this gtkmozembed pain will go away!

Really this should be patched in the fedora conduit package.

I spent a year trying to maintain a conduit.sh launcher that would find ff libs on all distros, but it is impossible.

Closing as invalid. The distros need to patch the conduit launcher to find their firefox libraries. Conduit now uses webkit for the web browser in both stable releases, and trunk