20 files declare their use of ConfirmFormBase in Zircon Profile 8

BanDelete.php in core/modules/ban/src/Form/BanDelete.php

Contains \Drupal\ban\Form\BanDelete.

BookRemoveForm.php in core/modules/book/src/Form/BookRemoveForm.php

Contains \Drupal\book\Form\BookRemoveForm.

ConfigSingleImportForm.php in core/modules/config/src/Form/ConfigSingleImportForm.php

Contains \Drupal\config\Form\ConfigSingleImportForm.

ConfigTranslationDeleteForm.php in core/modules/config_translation/src/Form/ConfigTranslationDeleteForm.php

Contains \Drupal\config_translation\Form\ConfigTranslationDeleteForm.

ConfirmDeleteMultiple.php in core/modules/comment/src/Form/ConfirmDeleteMultiple.php

Contains \Drupal\comment\Form\ConfirmDeleteMultiple.

ConfirmFormTestForm.php in core/modules/system/tests/modules/form_test/src/ConfirmFormTestForm.php

Contains \Drupal\form_test\ConfirmFormTestForm.

DblogClearLogConfirmForm.php in core/modules/dblog/src/Form/DblogClearLogConfirmForm.php

Contains \Drupal\dblog\Form\DblogClearLogConfirmForm.

DeleteForm.php in core/modules/path/src/Form/DeleteForm.php

Contains \Drupal\path\Form\DeleteForm.

DeleteForm.php in core/modules/forum/src/Form/DeleteForm.php

Contains \Drupal\forum\Form\DeleteForm.

DeleteMultiple.php in core/modules/node/src/Form/DeleteMultiple.php

Contains \Drupal\node\Form\DeleteMultiple.

ImageEffectDeleteForm.php in core/modules/image/src/Form/ImageEffectDeleteForm.php

Contains \Drupal\image\Form\ImageEffectDeleteForm.

MenuLinkResetForm.php in core/modules/menu_ui/src/Form/MenuLinkResetForm.php

Contains \Drupal\menu_ui\Form\MenuLinkResetForm.

ModulesListConfirmForm.php in core/modules/system/src/Form/ModulesListConfirmForm.php

Contains \Drupal\system\Form\ModulesListConfirmForm.

ModulesUninstallConfirmForm.php in core/modules/system/src/Form/ModulesUninstallConfirmForm.php

Contains \Drupal\system\Form\ModulesUninstallConfirmForm.

NegotiationBrowserDeleteForm.php in core/modules/language/src/Form/NegotiationBrowserDeleteForm.php

Contains \Drupal\language\Form\NegotiationBrowserDeleteForm.

NodeRevisionDeleteForm.php in core/modules/node/src/Form/NodeRevisionDeleteForm.php

Contains \Drupal\node\Form\NodeRevisionDeleteForm.

NodeRevisionRevertForm.php in core/modules/node/src/Form/NodeRevisionRevertForm.php

Contains \Drupal\node\Form\NodeRevisionRevertForm.

RebuildPermissionsForm.php in core/modules/node/src/Form/RebuildPermissionsForm.php

Contains \Drupal\node\Form\RebuildPermissionsForm.

ReindexConfirm.php in core/modules/search/src/Form/ReindexConfirm.php

Contains \Drupal\search\Form\ReindexConfirm.

UserMultipleCancelConfirm.php in core/modules/user/src/Form/UserMultipleCancelConfirm.php

Contains \Drupal\user\Form\UserMultipleCancelConfirm.