diff --git a/.travis.yml b/.travis.yml
index b56b53f1..b87699f7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -59,7 +59,7 @@ matrix:
       rvm: 2.7
       env: HEADLESS=true
     - gemfile: gemfiles/Gemfile.beta-versions
-      rvm: 2.6
+      rvm: 3.0
       env: CAPYBARA_FF=true
       addons:
         firefox: latest-beta
diff --git a/gemfiles/Gemfile.beta-versions b/gemfiles/Gemfile.beta-versions
index 706ed0fa..7d474104 100644
--- a/gemfiles/Gemfile.beta-versions
+++ b/gemfiles/Gemfile.beta-versions
@@ -7,13 +7,14 @@ gem 'pkg-config' # needed by nokogiri
 gem 'xpath', github: 'teamcapybara/xpath'
 gem 'rack', github: 'rack/rack'
 gem 'sinatra', github: 'sinatra/sinatra', branch: 'master'
-gem 'rspec', github: 'rspec/rspec'
-gem 'rspec-core', github: 'rspec/rspec-core'
-gem 'rspec-support', github: 'rspec/rspec-support'
-gem 'rspec-mocks', github: 'rspec/rspec-mocks'
-gem 'rspec-expectations', github: 'rspec/rspec-expectations'
+gem 'rspec', github: 'rspec/rspec', branch: 'main'
+gem 'rspec-core', github: 'rspec/rspec-core', branch: 'main'
+gem 'rspec-support', github: 'rspec/rspec-support', branch: 'main'
+gem 'rspec-mocks', github: 'rspec/rspec-mocks', branch: 'main'
+gem 'rspec-expectations', github: 'rspec/rspec-expectations', branch: 'main'
 gem 'cucumber', github: 'cucumber/cucumber-ruby'
 gem 'cucumber-core', github: 'cucumber/cucumber-ruby-core'
 gem 'cucumber-wire', github: 'cucumber/cucumber-ruby-wire'
 gem 'puma', github: 'puma/puma'
+gem 'selenium-webdriver', '>= 4.0.0.alpha7'
 
diff --git a/lib/capybara/registrations/drivers.rb b/lib/capybara/registrations/drivers.rb
index f80fa032..465ad5d4 100644
--- a/lib/capybara/registrations/drivers.rb
+++ b/lib/capybara/registrations/drivers.rb
@@ -9,32 +9,56 @@ Capybara.register_driver :selenium do |app|
 end
 
 Capybara.register_driver :selenium_headless do |app|
-  Capybara::Selenium::Driver.load_selenium
+  version = Capybara::Selenium::Driver.load_selenium
   browser_options = ::Selenium::WebDriver::Firefox::Options.new
+
   if browser_options.respond_to?(:headless!)
     browser_options.headless!
   else
     browser_options.args << '-headless'
   end
-  Capybara::Selenium::Driver.new(app, browser: :firefox, options: browser_options)
+
+  if version >= Gem::Version.new('4.0.0.alpha6')
+    Capybara::Selenium::Driver.new(app, browser: :firefox, capabilities: browser_options)
+  else
+    Capybara::Selenium::Driver.new(app, browser: :firefox, options: browser_options)
+  end
 end
 
 Capybara.register_driver :selenium_chrome do |app|
-  Capybara::Selenium::Driver.load_selenium
+  version = Capybara::Selenium::Driver.load_selenium
   browser_options = ::Selenium::WebDriver::Chrome::Options.new.tap do |opts|
     # Workaround https://bugs.chromium.org/p/chromedriver/issues/detail?id=2650&q=load&sort=-id&colspec=ID%20Status%20Pri%20Owner%20Summary
-    opts.args << '--disable-site-isolation-trials'
+    if opts.respond_to?(:add_argument)
+      opts.add_argument('--disable-site-isolation-trials')
+    else
+      opts.args << '--disable-site-isolation-trials'
+    end
+  end
+
+  if version >= Gem::Version.new('4.0.0.alpha6')
+    Capybara::Selenium::Driver.new(app, browser: :chrome, capabilities: browser_options)
+  else
+    Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options)
   end
-  Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options)
 end
 
 Capybara.register_driver :selenium_chrome_headless do |app|
-  Capybara::Selenium::Driver.load_selenium
+  version = Capybara::Selenium::Driver.load_selenium
   browser_options = ::Selenium::WebDriver::Chrome::Options.new.tap do |opts|
-    opts.args << '--headless'
+    if opts.respond_to?(:headless!)
+      opts.headless!
+    else
+      opts.args << '--headless'
+    end
     opts.args << '--disable-gpu' if Gem.win_platform?
     # Workaround https://bugs.chromium.org/p/chromedriver/issues/detail?id=2650&q=load&sort=-id&colspec=ID%20Status%20Pri%20Owner%20Summary
     opts.args << '--disable-site-isolation-trials'
   end
-  Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options)
+
+  if version >= Gem::Version.new('4.0.0.alpha6')
+    Capybara::Selenium::Driver.new(app, browser: :chrome, capabilities: browser_options)
+  else
+    Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options)
+  end
 end
diff --git a/lib/capybara/selenium/driver.rb b/lib/capybara/selenium/driver.rb
index b7452074..bb0e0d7e 100644
--- a/lib/capybara/selenium/driver.rb
+++ b/lib/capybara/selenium/driver.rb
@@ -15,6 +15,8 @@ class Capybara::Selenium::Driver < Capybara::Driver::Base
   attr_reader :app, :options
 
   class << self
+    attr_reader :selenium_webdriver_version
+
     def load_selenium
       require 'selenium-webdriver'
       require 'capybara/selenium/logger_suppressor'
@@ -32,15 +34,18 @@ class Capybara::Selenium::Driver < Capybara::Driver::Base
       # Selenium::WebDriver::VERSION. Ideally we'd
       # use the constant in all cases, but earlier versions
       # of `selenium-webdriver` didn't provide the constant.
-      selenium_webdriver_version =
+      @selenium_webdriver_version =
         if Gem.loaded_specs['selenium-webdriver']
           Gem.loaded_specs['selenium-webdriver'].version
         else
           Gem::Version.new(Selenium::WebDriver::VERSION)
         end
-      if selenium_webdriver_version < Gem::Version.new('3.5.0')
+
+      if @selenium_webdriver_version < Gem::Version.new('3.5.0')
         warn "Warning: You're using an unsupported version of selenium-webdriver, please upgrade."
       end
+
+      @selenium_webdriver_version
     rescue LoadError => e
       raise e unless e.message.include?('selenium-webdriver')
 
@@ -66,7 +71,15 @@ class Capybara::Selenium::Driver < Capybara::Driver::Base
         end
       end
       processed_options = options.reject { |key, _val| SPECIAL_OPTIONS.include?(key) }
-      @browser = Selenium::WebDriver.for(options[:browser], **processed_options)
+
+      @browser = if options[:browser] == :firefox &&
+                    RUBY_VERSION >= '3.0' &&
+                    Capybara::Selenium::Driver.selenium_webdriver_version <= Gem::Version.new('4.0.0.alpha1')
+        # selenium-webdriver 3.x doesn't correctly pass options through for Firefox with Ruby 3 so workaround that
+        Selenium::WebDriver::Firefox::Driver.new(**processed_options)
+      else
+        Selenium::WebDriver.for(options[:browser], processed_options)
+      end
 
       specialize_driver
       setup_exit_handler
diff --git a/lib/capybara/selenium/logger_suppressor.rb b/lib/capybara/selenium/logger_suppressor.rb
index f9515636..69ec9ef5 100644
--- a/lib/capybara/selenium/logger_suppressor.rb
+++ b/lib/capybara/selenium/logger_suppressor.rb
@@ -8,7 +8,7 @@ module Capybara
         super
       end
 
-      def deprecate(*)
+      def deprecate(*, **, &block)
         super unless @suppress_for_capybara
       end
 
diff --git a/spec/selenium_spec_chrome.rb b/spec/selenium_spec_chrome.rb
index e7df53b1..4cde86ba 100644
--- a/spec/selenium_spec_chrome.rb
+++ b/spec/selenium_spec_chrome.rb
@@ -19,39 +19,71 @@ browser_options.add_preference('download.default_directory', Capybara.save_path)
 browser_options.add_preference(:download, default_directory: Capybara.save_path)
 
 Capybara.register_driver :selenium_chrome do |app|
-  Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options, timeout: 30).tap do |driver|
+  version = Capybara::Selenium::Driver.load_selenium
+  driver_options = { browser: :chrome, timeout: 30 }.tap do |opts|
+    if version >= Gem::Version.new('4.0.0.alpha6')
+      opts[:capabilities] = browser_options
+    else
+      opts[:options] = browser_options
+    end
+  end
+
+  Capybara::Selenium::Driver.new(app, **driver_options).tap do |driver|
     # Set download dir for Chrome < 77
     driver.browser.download_path = Capybara.save_path
   end
 end
 
 Capybara.register_driver :selenium_chrome_not_clear_storage do |app|
-  chrome_options = {
-    browser: :chrome,
-    options: browser_options
-  }
-  Capybara::Selenium::Driver.new(app, **chrome_options.merge(clear_local_storage: false, clear_session_storage: false))
+  version = Capybara::Selenium::Driver.load_selenium
+  chrome_options = { browser: :chrome, clear_local_storage: false, clear_session_storage: false }.tap do |opts|
+    if version >= Gem::Version.new('4.0.0.alpha6')
+      opts[:capabilities] = browser_options
+    else
+      opts[:options] = browser_options
+    end
+  end
+
+  Capybara::Selenium::Driver.new(app, **chrome_options)
 end
 
 Capybara.register_driver :selenium_chrome_not_clear_session_storage do |app|
-  chrome_options = {
-    browser: :chrome,
-    options: browser_options
-  }
-  Capybara::Selenium::Driver.new(app, **chrome_options.merge(clear_session_storage: false))
+  version = Capybara::Selenium::Driver.load_selenium
+  chrome_options = { browser: :chrome, clear_session_storage: false }.tap do |opts|
+    if version >= Gem::Version.new('4.0.0.alpha6')
+      opts[:capabilities] = browser_options
+    else
+      opts[:options] = browser_options
+    end
+  end
+
+  Capybara::Selenium::Driver.new(app, **chrome_options)
 end
 
 Capybara.register_driver :selenium_chrome_not_clear_local_storage do |app|
-  chrome_options = {
-    browser: :chrome,
-    options: browser_options
-  }
-  Capybara::Selenium::Driver.new(app, **chrome_options.merge(clear_local_storage: false))
+  version = Capybara::Selenium::Driver.load_selenium
+  chrome_options = { browser: :chrome, clear_local_storage: false }.tap do |opts|
+    if version >= Gem::Version.new('4.0.0.alpha6')
+      opts[:capabilities] = browser_options
+    else
+      opts[:options] = browser_options
+    end
+  end
+  Capybara::Selenium::Driver.new(app, **chrome_options)
 end
 
 Capybara.register_driver :selenium_driver_subclass_with_chrome do |app|
+  version = Capybara::Selenium::Driver.load_selenium
   subclass = Class.new(Capybara::Selenium::Driver)
-  subclass.new(app, browser: :chrome, options: browser_options, timeout: 30)
+  chrome_options = { browser: :chrome, timeout: 30 }.tap do |opts|
+    if version >= Gem::Version.new('4.0.0.alpha6')
+      opts[:capabilities] = browser_options
+    else
+      opts[:options] = browser_options
+    end
+  end
+
+  subclass.new(app, **chrome_options)
 end
 
 module TestSessions
diff --git a/spec/selenium_spec_firefox.rb b/spec/selenium_spec_firefox.rb
index fae7a531..87173c79 100644
--- a/spec/selenium_spec_firefox.rb
+++ b/spec/selenium_spec_firefox.rb
@@ -14,28 +14,36 @@ browser_options.profile = Selenium::WebDriver::Firefox::Profile.new.tap do |prof
   profile['browser.download.dir'] = Capybara.save_path
   profile['browser.download.folderList'] = 2
   profile['browser.helperApps.neverAsk.saveToDisk'] = 'text/csv'
+  profile['browser.startup.homepage'] = 'about:blank' # workaround bug in Selenium 4 alpha4-7
 end
 
 Capybara.register_driver :selenium_firefox do |app|
   # ::Selenium::WebDriver.logger.level = "debug"
-  Capybara::Selenium::Driver.new(
-    app,
-    browser: :firefox,
-    options: browser_options,
-    timeout: 31
+  version = Capybara::Selenium::Driver.load_selenium
+  driver_options = { browser: :firefox, timeout: 31 }.tap do |opts|
+    if version >= Gem::Version.new('4.0.0.alpha6')
+      opts[:capabilities] = browser_options
+    else
+      opts[:options] = browser_options
+    end
     # Get a trace level log from geckodriver
     # :driver_opts => { args: ['-vv'] }
-  )
+  end
+
+  Capybara::Selenium::Driver.new(app, **driver_options)
 end
 
 Capybara.register_driver :selenium_firefox_not_clear_storage do |app|
-  Capybara::Selenium::Driver.new(
-    app,
-    browser: :firefox,
-    clear_local_storage: false,
-    clear_session_storage: false,
-    options: browser_options
-  )
+  version = Capybara::Selenium::Driver.load_selenium
+  driver_options = { browser: :firefox, clear_local_storage: false, clear_session_storage: false }.tap do |opts|
+    if version >= Gem::Version.new('4.0.0.alpha6')
+      opts[:capabilities] = browser_options
+    else
+      opts[:options] = browser_options
+    end
+  end
+
+  Capybara::Selenium::Driver.new(app, **driver_options)
 end
 
 module TestSessions