Provides a dead-simple way to run scenarios with Firebug enabled under the selenium driver
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capybara-firebug provides a dead-simple way to run Capybara-based Cucumber scenarios or RSpec request specs with Firebug enabled under the selenium driver.

  1. Install the gem
  2. require 'capybara/firebug' in env.rb or spec_helper.rb
  3. Tag the tests you need to debug:
    • Tag Cucumber scenarios with @firebug
    • Tag RSpec examples with :firebug => true
  4. Run 'em

Firebug will be set up so that all features are fully enabled on every page.

You'll want to be able to pause the scenario at some point to inspect things in Firebug. A step definition for Then stop and let me debug is provided for this purpose. When executed, it breaks in the Ruby debugger. (If you are using bundler, you will also need to specify the correct debugging gem in your Gemfile: gem 'ruby-debug' for 1.8, gem 'ruby-debug19' for 1.9.)

Firebug Versions

By default, this gem uses Firebug 1.11.0, which is compatible with Firefox 17-20.

If you want to use Firebug 1.7.3 (compatible with Firefox 3.6, 4, and 5), 1.9.2 (compatible with Firefox 6-13), or 1.10.6 (compatible with Firefox 13-18), you need to explicitly specify the firebug_version setting in your capybara.rb support file:

# located in features/support/capybara.rb or similar
require 'capybara/firebug'
Selenium::WebDriver::Firefox::Profile.firebug_version = '1.7.3'

Customizing the Profile

If you wish to further customize the Firefox profile used by selenium, you can use the #enable_firebug method to add the Firebug extension to it:

profile =

This can also be used to enable Firebug on a remote browser:,
   :browser => :remote,
   :url => "http://my.ip.add.ress:4444/wd/hub",
   :desired_capabilities => Selenium::WebDriver::Remote::Capabilities.firefox(:firefox_profile => profile))