Unfortunately, Firebug debugging is still problematic. Breakpoints only work at the top scope in modules. (They actually work in the top level and second level scopes in scripts, but rave introduces a scope to contain node modules.) The result is that you can't use breakpoints anywhere useful.
This is a known bug in the Firebug issue tracker. Please add any additional data you may have or just star the issue so it gets the proper attention.