no such file to load -- ruby-debug (LoadError) about capybara-firebug HOT 6 CLOSED

It depends on the ruby-debug gem, this should be specified in the gemspec as dependency.
BTW ruby-debug gem seems to me not compatible with Ruby 1.9.2, so I tried use a simple "sleep step" instead of the provided "stop and let me debug" step.

Given /^I sleep (\d+) seconds$/ do |sec|
  sleep sec.to_i
end

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Use ruby-debug19 for 1.9.X

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Awesome, works

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I would write a patch but I don't know how to specify a different dependecy in the gemspec depending on the Ruby version!

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Use RUBY_VERSION constant

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Unfortunately there is no clean way to specify a dependency in the gemspec that varies depending on the Ruby version. So you will need to add it to your Gemspec. I've added documentation to this effect to the README.

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