Conkeror-rc is a project mainly written in JavaScript, it's free.
Configuration files for conkeror
Conkeror loads it's settings from a file called .conkerorrc which should be present in your home directory.
My .conkerorrc has the following in it:
user_pref('conkeror.rcfile', '/home/vedang/conkeror-rc'); reinit();
This loads all the .js files in the conkeror-rc folder.