Attach a rails web console to any page by adding ?web_console=

rails_web_console_param.rb

# config/initializers/web_console.rb
WebConsoleBeforeAction = ->(controller) do
  controller.console if controller.params[:web_console]
end

ApplicationController.before_action(WebConsoleBeforeAction) if defined?(WebConsole) && Rails.env.development?

# NOTE:
# For security reasons only do this in development.

&& !Rails.env.production?

I would never load WebConsole in production.
Updated the gist anyway.. Thanks @sb8244 :)

Cool, tks