diff --git a/app/components/webauthn_input_component.rb b/app/components/webauthn_input_component.rb
index 8c2b952b5f6..f029d9f1c8f 100644
--- a/app/components/webauthn_input_component.rb
+++ b/app/components/webauthn_input_component.rb
@@ -1,21 +1,25 @@
 # frozen_string_literal: true
 
 class WebauthnInputComponent < BaseComponent
-  attr_reader :platform, :passkey_supported_only, :show_unsupported_passkey, :tag_options
+  attr_reader :platform, :passkey_supported_only, :show_unsupported_passkey,
+              :desktop_ft_unlock_option, :tag_options
 
   alias_method :platform?, :platform
   alias_method :passkey_supported_only?, :passkey_supported_only
   alias_method :show_unsupported_passkey?, :show_unsupported_passkey
+  alias_method :desktop_ft_unlock_option?, :desktop_ft_unlock_option
 
   def initialize(
     platform: false,
     passkey_supported_only: false,
     show_unsupported_passkey: false,
+    desktop_ft_unlock_option: false,
     **tag_options
   )
     @platform = platform
     @passkey_supported_only = passkey_supported_only
     @show_unsupported_passkey = show_unsupported_passkey
+    @desktop_ft_unlock_option = desktop_ft_unlock_option
     @tag_options = tag_options
   end
 
@@ -26,6 +30,7 @@ def call
       **tag_options,
       **initial_hidden_tag_options,
       'show-unsupported-passkey': show_unsupported_passkey?.presence,
+      'desktop-ft-unlock-option': show_desktop_ft_unlock_option?.presence,
     )
   end
 
@@ -36,4 +41,8 @@ def initial_hidden_tag_options
       { class: 'js' }
     end
   end
+
+  def show_desktop_ft_unlock_option?
+    desktop_ft_unlock_option? && I18n.locale == :en
+  end
 end
diff --git a/app/controllers/users/two_factor_authentication_setup_controller.rb b/app/controllers/users/two_factor_authentication_setup_controller.rb
index 34b5370f2ce..3bfe5e83455 100644
--- a/app/controllers/users/two_factor_authentication_setup_controller.rb
+++ b/app/controllers/users/two_factor_authentication_setup_controller.rb
@@ -5,6 +5,7 @@ class TwoFactorAuthenticationSetupController < ApplicationController
     include UserAuthenticator
     include MfaSetupConcern
     include AbTestingConcern
+    include ApplicationHelper
 
     before_action :authenticate_user
     before_action :confirm_user_authenticated_for_2fa_setup
@@ -68,6 +69,7 @@ def two_factor_options_presenter
         show_skip_additional_mfa_link: show_skip_additional_mfa_link?,
         after_mfa_setup_path:,
         return_to_sp_cancel_path:,
+        desktop_ft_ab_test: in_ab_test_bucket?,
       )
     end
 
@@ -81,5 +83,9 @@ def two_factor_options_form_params
     rescue ActionController::ParameterMissing
       ActionController::Parameters.new(selection: [])
     end
+
+    def in_ab_test_bucket?
+      ab_test_bucket(:DESKTOP_FT_UNLOCK_SETUP) == (:desktop_ft_unlock_option_shown)
+    end
   end
 end
diff --git a/app/controllers/users/webauthn_setup_controller.rb b/app/controllers/users/webauthn_setup_controller.rb
index b67f5b04275..b7ae7912f5a 100644
--- a/app/controllers/users/webauthn_setup_controller.rb
+++ b/app/controllers/users/webauthn_setup_controller.rb
@@ -88,7 +88,7 @@ def validate_existing_platform_authenticator
       if platform_authenticator? && in_account_creation_flow? &&
          current_user.webauthn_configurations.platform_authenticators.present?
         redirect_to authentication_methods_setup_path
-     end
+      end
     end
 
     def webauthn_auth_method
diff --git a/app/javascript/packages/webauthn/webauthn-input-element.spec.ts b/app/javascript/packages/webauthn/webauthn-input-element.spec.ts
index afd363cc143..641058c2ec3 100644
--- a/app/javascript/packages/webauthn/webauthn-input-element.spec.ts
+++ b/app/javascript/packages/webauthn/webauthn-input-element.spec.ts
@@ -40,6 +40,20 @@ describe('WebauthnInputElement', () => {
       });
     });
 
+    context('as a part of A/B test', () => {
+      beforeEach(() => {
+        isWebauthnPasskeySupported.returns(false);
+        isWebauthnPlatformAvailable.resolves(true);
+        document.body.innerHTML = `<lg-webauthn-input desktop-ft-unlock-option hidden></lg-webauthn-input>`;
+      });
+
+      it('becomes visible', async () => {
+        const element = document.querySelector('lg-webauthn-input')!;
+
+        await waitFor(() => expect(element.hidden).to.be.false());
+      });
+    });
+
     context('unsupported passkey shown', () => {
       beforeEach(() => {
         isWebauthnPasskeySupported.returns(false);
diff --git a/app/javascript/packages/webauthn/webauthn-input-element.ts b/app/javascript/packages/webauthn/webauthn-input-element.ts
index 954cac625c0..a7e9759b6c4 100644
--- a/app/javascript/packages/webauthn/webauthn-input-element.ts
+++ b/app/javascript/packages/webauthn/webauthn-input-element.ts
@@ -1,11 +1,15 @@
-import isWebauthnPasskeySupported from './is-webauthn-passkey-supported';
 import isWebauthnPlatformAuthenticatorAvailable from './is-webauthn-platform-authenticator-available';
+import isWebauthnPasskeySupported from './is-webauthn-passkey-supported';
 
 export class WebauthnInputElement extends HTMLElement {
   connectedCallback() {
     this.toggleVisibleIfPasskeySupported();
   }
 
+  get isOptedInToAbTest(): boolean {
+    return this.hasAttribute('desktop-ft-unlock-option');
+  }
+
   get isPlatform(): boolean {
     return this.hasAttribute('platform');
   }
@@ -19,7 +23,10 @@ export class WebauthnInputElement extends HTMLElement {
       return;
     }
 
-    if (isWebauthnPasskeySupported() && (await isWebauthnPlatformAuthenticatorAvailable())) {
+    if (
+      (isWebauthnPasskeySupported() || this.isOptedInToAbTest) &&
+      (await isWebauthnPlatformAuthenticatorAvailable())
+    ) {
       this.hidden = false;
     } else if (this.showUnsupportedPasskey) {
       this.hidden = false;
diff --git a/app/presenters/two_factor_authentication/set_up_selection_presenter.rb b/app/presenters/two_factor_authentication/set_up_selection_presenter.rb
index 798cd289c67..7942bcfc260 100644
--- a/app/presenters/two_factor_authentication/set_up_selection_presenter.rb
+++ b/app/presenters/two_factor_authentication/set_up_selection_presenter.rb
@@ -4,7 +4,11 @@ module TwoFactorAuthentication
   class SetUpSelectionPresenter
     include ActionView::Helpers::TranslationHelper
 
-    attr_reader :user, :piv_cac_required, :phishing_resistant_required, :user_agent
+    attr_reader :user,
+                :piv_cac_required,
+                :phishing_resistant_required,
+                :user_agent,
+                :desktop_ft_ab_test
     alias_method :piv_cac_required?, :piv_cac_required
     alias_method :phishing_resistant_required?, :phishing_resistant_required
 
@@ -12,12 +16,14 @@ def initialize(
       user:,
       piv_cac_required: false,
       phishing_resistant_required: false,
-      user_agent: nil
+      user_agent: nil,
+      desktop_ft_ab_test: nil
     )
       @user = user
       @piv_cac_required = piv_cac_required
       @phishing_resistant_required = phishing_resistant_required
       @user_agent = user_agent
+      @desktop_ft_ab_test = desktop_ft_ab_test
     end
 
     def render_in(view_context, &block)
diff --git a/app/presenters/two_factor_authentication/set_up_webauthn_platform_selection_presenter.rb b/app/presenters/two_factor_authentication/set_up_webauthn_platform_selection_presenter.rb
index a4fef5d7285..1e7ff563da8 100644
--- a/app/presenters/two_factor_authentication/set_up_webauthn_platform_selection_presenter.rb
+++ b/app/presenters/two_factor_authentication/set_up_webauthn_platform_selection_presenter.rb
@@ -13,6 +13,7 @@ def render_in(view_context, &block)
           passkey_supported_only: true,
           show_unsupported_passkey:
             IdentityConfig.store.show_unsupported_passkey_platform_authentication_setup,
+          desktop_ft_unlock_option: desktop_ft_ab_test,
         ),
         &block
       )
diff --git a/app/presenters/two_factor_options_presenter.rb b/app/presenters/two_factor_options_presenter.rb
index 3477afbd009..1dc080b59e4 100644
--- a/app/presenters/two_factor_options_presenter.rb
+++ b/app/presenters/two_factor_options_presenter.rb
@@ -8,7 +8,8 @@ class TwoFactorOptionsPresenter
               :return_to_sp_cancel_path,
               :phishing_resistant_required,
               :piv_cac_required,
-              :user_agent
+              :user_agent,
+              :desktop_ft_ab_test
 
   delegate :two_factor_enabled?, to: :mfa_policy
   def initialize(
@@ -18,7 +19,8 @@ def initialize(
     piv_cac_required: false,
     show_skip_additional_mfa_link: true,
     after_mfa_setup_path: nil,
-    return_to_sp_cancel_path: nil
+    return_to_sp_cancel_path: nil,
+    desktop_ft_ab_test: false
   )
     @user_agent = user_agent
     @user = user
@@ -27,6 +29,7 @@ def initialize(
     @show_skip_additional_mfa_link = show_skip_additional_mfa_link
     @after_mfa_setup_path = after_mfa_setup_path
     @return_to_sp_cancel_path = return_to_sp_cancel_path
+    @desktop_ft_ab_test = desktop_ft_ab_test
   end
 
   def options
@@ -47,6 +50,7 @@ def all_options_sorted
         piv_cac_required: piv_cac_required?,
         phishing_resistant_required: phishing_resistant_only?,
         user_agent:,
+        desktop_ft_ab_test:,
       )
     end.
       partition(&:recommended?).
diff --git a/config/application.yml.default b/config/application.yml.default
index 81b1cc3ebcc..7a76d98eed1 100644
--- a/config/application.yml.default
+++ b/config/application.yml.default
@@ -89,6 +89,7 @@ database_worker_jobs_sslmode: 'verify-full'
 database_worker_jobs_username: ''
 deleted_user_accounts_report_configs: '[]'
 deliver_mail_async: false
+desktop_ft_unlock_setup_option_percent_tested: 0
 development_mailer_deliver_method: letter_opener
 disable_email_sending: true
 disable_logout_get_request: true
@@ -457,6 +458,7 @@ development:
   compromised_password_randomizer_value: 1
   dashboard_api_token: test_token
   dashboard_url: http://localhost:3001/api/service_providers
+  desktop_ft_unlock_setup_option_percent_tested: 100
   doc_auth_selfie_desktop_test_mode: true
   domain_name: localhost:3000
   enable_rate_limiting: false
diff --git a/config/initializers/ab_tests.rb b/config/initializers/ab_tests.rb
index fff91a2dd65..c4a4cce8924 100644
--- a/config/initializers/ab_tests.rb
+++ b/config/initializers/ab_tests.rb
@@ -104,4 +104,15 @@ def self.all
       shadow_mode_enabled: IdentityConfig.store.socure_idplus_shadow_mode_percent,
     },
   ).freeze
+
+  DESKTOP_FT_UNLOCK_SETUP = AbTest.new(
+    experiment_name: 'Desktop F/T unlock setup',
+    should_log: [
+      'User Registration: 2FA Setup visited',
+      :webauthn_setup_submitted,
+      'Multi-Factor Authentication Setup',
+    ].to_set,
+    buckets: { desktop_ft_unlock_option_shown:
+        IdentityConfig.store.desktop_ft_unlock_setup_option_percent_tested },
+  ).freeze
 end
diff --git a/lib/identity_config.rb b/lib/identity_config.rb
index d85fbef073d..f8a5467d2af 100644
--- a/lib/identity_config.rb
+++ b/lib/identity_config.rb
@@ -107,6 +107,7 @@ def self.store
     config.add(:database_worker_jobs_username, type: :string)
     config.add(:deleted_user_accounts_report_configs, type: :json)
     config.add(:deliver_mail_async, type: :boolean)
+    config.add(:desktop_ft_unlock_setup_option_percent_tested, type: :integer)
     config.add(:development_mailer_deliver_method, type: :symbol, enum: [:file, :letter_opener])
     config.add(:disable_email_sending, type: :boolean)
     config.add(:disable_logout_get_request, type: :boolean)
diff --git a/spec/components/webauthn_input_component_spec.rb b/spec/components/webauthn_input_component_spec.rb
index 2e9f99d9931..5212698d7e9 100644
--- a/spec/components/webauthn_input_component_spec.rb
+++ b/spec/components/webauthn_input_component_spec.rb
@@ -17,8 +17,26 @@
     expect(component.passkey_supported_only?).to eq(false)
   end
 
-  it 'exposes boolean alias for show_unsupported_passkey option' do
-    expect(component.show_unsupported_passkey?).to eq(false)
+  it 'does not render desktop-ft-unlock-option attribute' do
+    expect(rendered).to have_css('lg-webauthn-input:not([desktop-ft-unlock-option="false"])')
+  end
+
+  context 'with desktop_ft_unlock_option' do
+    let(:options) { super().merge(desktop_ft_unlock_option: true) }
+
+    it 'does render desktop-ft-unlock-option attribute' do
+      expect(rendered).to have_css('lg-webauthn-input[desktop-ft-unlock-option="true"]')
+    end
+
+    context 'in a locale other than english' do
+      before do
+        I18n.locale = I18n.available_locales.sample
+      end
+
+      it 'does not render desktop-ft-unlock-option attribute' do
+        expect(rendered).to have_css('lg-webauthn-input:not([desktop-ft-unlock-option="false"])')
+      end
+    end
   end
 
   context 'with platform option' do
diff --git a/spec/config/initializers/ab_tests_spec.rb b/spec/config/initializers/ab_tests_spec.rb
index 8c14e6f0924..724b71e32df 100644
--- a/spec/config/initializers/ab_tests_spec.rb
+++ b/spec/config/initializers/ab_tests_spec.rb
@@ -220,7 +220,7 @@
     end
   end
 
-  describe '.RECOMMEND_WEBAUTHN_PLATFORM_FOR_SMS_USER' do
+  describe 'RECOMMEND_WEBAUTHN_PLATFORM_FOR_SMS_USER' do
     let(:user) { create(:user) }
 
     subject(:bucket) do
@@ -301,4 +301,49 @@
       end
     end
   end
+
+  describe 'DESKTOP_FT_UNLOCK_SETUP' do
+    let(:user) { nil }
+    let(:user_session) { {} }
+
+    subject(:bucket) do
+      AbTests::DESKTOP_FT_UNLOCK_SETUP.bucket(
+        request: nil,
+        service_provider: nil,
+        session: nil,
+        user:,
+        user_session:,
+      )
+    end
+
+    context 'when A/B test is disabled' do
+      before do
+        allow(IdentityConfig.store).to receive(:desktop_ft_unlock_setup_option_percent_tested).
+          and_return(0)
+        reload_ab_tests
+      end
+
+      context 'when it would otherwise assign a bucket' do
+        let(:user) { build(:user) }
+
+        it 'does not return a bucket' do
+          expect(bucket).to be_nil
+        end
+      end
+    end
+
+    context 'when A/B test is enabled' do
+      before do
+        allow(IdentityConfig.store).to receive(:desktop_ft_unlock_setup_option_percent_tested).
+          and_return(100)
+        reload_ab_tests
+      end
+
+      let(:user) { build(:user) }
+
+      it 'returns a bucket' do
+        expect(bucket).not_to be_nil
+      end
+    end
+  end
 end
diff --git a/spec/controllers/users/two_factor_authentication_setup_controller_spec.rb b/spec/controllers/users/two_factor_authentication_setup_controller_spec.rb
index 1cc8d62a217..574627a8860 100644
--- a/spec/controllers/users/two_factor_authentication_setup_controller_spec.rb
+++ b/spec/controllers/users/two_factor_authentication_setup_controller_spec.rb
@@ -4,6 +4,8 @@
   describe 'GET index' do
     let(:user) { create(:user) }
 
+    subject(:response) { get :index }
+
     before do
       stub_sign_in_before_2fa(user) if user
       stub_analytics
@@ -19,6 +21,12 @@
       )
     end
 
+    it 'initializes presenter with false ab test bucket value' do
+      response
+
+      expect(assigns(:presenter).desktop_ft_ab_test).to be false
+    end
+
     context 'with user having gov or mil email' do
       let!(:federal_domain) { create(:federal_email_domain, name: 'gsa.gov') }
       let(:user) do
@@ -101,6 +109,20 @@
         expect(response).to redirect_to(user_two_factor_authentication_url)
       end
     end
+
+    context 'with user opted in to desktop ft unlock setup ab test' do
+      before do
+        allow(controller).to receive(:ab_test_bucket).with(
+          :DESKTOP_FT_UNLOCK_SETUP,
+        ).and_return(:desktop_ft_unlock_option_shown)
+      end
+
+      it 'initializes presenter with ab test bucket value' do
+        response
+
+        expect(assigns(:presenter).desktop_ft_ab_test).to eq(true)
+      end
+    end
   end
 
   describe '#create' do
diff --git a/spec/features/webauthn/hidden_spec.rb b/spec/features/webauthn/hidden_spec.rb
index 57b52cbb92b..0c0ea800316 100644
--- a/spec/features/webauthn/hidden_spec.rb
+++ b/spec/features/webauthn/hidden_spec.rb
@@ -3,6 +3,7 @@
 RSpec.describe 'webauthn hide' do
   include JavascriptDriverHelper
   include WebAuthnHelper
+  include AbTestsHelper
 
   describe 'security key' do
     let(:option_id) { 'two_factor_options_form_selection_webauthn' }
@@ -59,6 +60,36 @@
           expect(webauthn_option_hidden?).to eq(true)
         end
 
+        context 'when in ab test for desktop setup' do
+          before do
+            allow(IdentityConfig.store).to receive(:desktop_ft_unlock_setup_option_percent_tested).
+              and_return(100)
+            reload_ab_tests
+          end
+
+          it 'displays the authenticator option' do
+            sign_up_and_set_password
+            simulate_platform_authenticator_available
+
+            expect(webauthn_option_hidden?).to eq(false)
+          end
+        end
+
+        context 'when A/B test is disabled' do
+          before do
+            allow(IdentityConfig.store).to receive(:desktop_ft_unlock_setup_option_percent_tested).
+              and_return(0)
+            reload_ab_tests
+          end
+
+          it 'hides the authenticator option' do
+            sign_up_and_set_password
+            simulate_platform_authenticator_available
+
+            expect(webauthn_option_hidden?).to eq(true)
+          end
+        end
+
         context 'with supported browser and platform authenticator available',
                 driver: :headless_chrome_mobile do
           it 'displays the authenticator option' do