Switch to using suspender's Capybara configuration

With more recent Chromedriver versions, we need to specify the headless
window size which this does. Plus more familiarity with this
configuration.

spec/rails_helper.rb

@@ -6,7 +6,6 @@
 
 require "rspec/rails"
 require "shoulda/matchers"
-require "selenium/webdriver"
 
 Dir[Rails.root.join("../../spec/support/**/*.rb")].each { |file| require file }
 
@@ -31,22 +30,3 @@ module Features
 end
 
 ActiveRecord::Migration.maintain_test_schema!
-
-Capybara.register_driver :chrome do |app|
-  Capybara::Selenium::Driver.new(app, browser: :chrome)
-end
-
-Capybara.register_driver :headless_chrome do |app|
-  capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(
-    chromeOptions: {
-      args: %w[headless enable-features=NetworkService,NetworkServiceInProcess]
-    }
-  )
-  Capybara::Selenium::Driver.new app,
-    browser: :chrome,
-    desired_capabilities: capabilities
-end
-
-Capybara.javascript_driver = :selenium_chrome_headless
-
-Capybara.server = :webrick

spec/support/webdrivers.rb

@@ -0,0 +1,30 @@
+require "selenium/webdriver"
+
+Capybara.register_driver :chrome do |app|
+  Capybara::Selenium::Driver.new(app, browser: :chrome)
+end
+
+Capybara.register_driver :headless_chrome do |app|
+  options = ::Selenium::WebDriver::Chrome::Options.new
+  options.headless!
+  options.add_argument "--window-size=1680,1050"
+
+  Capybara::Selenium::Driver.new(
+    app,
+    browser: :chrome,
+    options: options,
+  )
+end
+
+Capybara.javascript_driver = :headless_chrome
+Capybara.server = :webrick
+
+RSpec.configure do |config|
+  config.before(:each, type: :system) do
+    driven_by :rack_test
+  end
+
+  config.before(:each, type: :system, js: true) do
+    driven_by Capybara.javascript_driver
+  end
+end