diff --git a/wagtail/admin/views/generic/base.py b/wagtail/admin/views/generic/base.py
index fadabf86e6..365e9338a1 100644
--- a/wagtail/admin/views/generic/base.py
+++ b/wagtail/admin/views/generic/base.py
@@ -22,6 +22,8 @@ class WagtailAdminTemplateMixin(TemplateResponseMixin, ContextMixin):
     page_title = ""
     page_subtitle = ""
     header_icon = ""
+    # Breadcrumbs are opt-in until we have a design that can be consistently applied
+    _show_breadcrumbs = False
     breadcrumbs_items = [{"url": reverse_lazy("wagtailadmin_home"), "label": _("Home")}]
     template_name = "wagtailadmin/generic/base.html"
 
@@ -42,7 +44,9 @@ class WagtailAdminTemplateMixin(TemplateResponseMixin, ContextMixin):
         context["page_title"] = self.get_page_title()
         context["page_subtitle"] = self.get_page_subtitle()
         context["header_icon"] = self.get_header_icon()
-        context["breadcrumbs_items"] = self.get_breadcrumbs_items()
+        context["breadcrumbs_items"] = None
+        if self._show_breadcrumbs:
+            context["breadcrumbs_items"] = self.get_breadcrumbs_items()
         return context
 
     def get_template_names(self):
diff --git a/wagtail/admin/viewsets/model.py b/wagtail/admin/viewsets/model.py
index a1bb6afc8e..1d5ced483c 100644
--- a/wagtail/admin/viewsets/model.py
+++ b/wagtail/admin/viewsets/model.py
@@ -52,6 +52,9 @@ class ModelViewSet(ViewSet):
     #: The view class to use for the inspect view; must be a subclass of ``wagtail.admin.views.generic.InspectView``.
     inspect_view_class = generic.InspectView
 
+    # Breadcrumbs can be turned off until we have a design that can be consistently applied
+    _show_breadcrumbs = True
+
     #: The prefix of template names to look for when rendering the admin views.
     template_prefix = ""
 
@@ -119,6 +122,7 @@ class ModelViewSet(ViewSet):
                 "edit_url_name": self.get_url_name("edit"),
                 "delete_url_name": self.get_url_name("delete"),
                 "header_icon": self.icon,
+                "_show_breadcrumbs": self._show_breadcrumbs,
                 **kwargs,
             }
         )
diff --git a/wagtail/locales/views.py b/wagtail/locales/views.py
index 9d6e455931..43ec51cb75 100644
--- a/wagtail/locales/views.py
+++ b/wagtail/locales/views.py
@@ -98,6 +98,7 @@ class LocaleViewSet(ModelViewSet):
     model = Locale
     permission_policy = locale_permission_policy
     add_to_reference_index = False
+    _show_breadcrumbs = False
 
     index_view_class = IndexView
     add_view_class = CreateView
diff --git a/wagtail/sites/views.py b/wagtail/sites/views.py
index 6b48612496..5112585cb6 100644
--- a/wagtail/sites/views.py
+++ b/wagtail/sites/views.py
@@ -52,6 +52,7 @@ class SiteViewSet(ModelViewSet):
     model = Site
     permission_policy = site_permission_policy
     add_to_reference_index = False
+    _show_breadcrumbs = False
 
     index_view_class = IndexView
     add_view_class = CreateView
diff --git a/wagtail/snippets/views/snippets.py b/wagtail/snippets/views/snippets.py
index 8ece57a455..e8d1cf5d4e 100644
--- a/wagtail/snippets/views/snippets.py
+++ b/wagtail/snippets/views/snippets.py
@@ -79,6 +79,7 @@ class ModelIndexView(generic.IndexView):
     header_icon = "snippet"
     index_url_name = "wagtailsnippets:index"
     default_ordering = "name"
+    _show_breadcrumbs = True
 
     def setup(self, request, *args, **kwargs):
         super().setup(request, *args, **kwargs)
diff --git a/wagtail/users/views/groups.py b/wagtail/users/views/groups.py
index 44eb48e532..dfe6a49ca7 100644
--- a/wagtail/users/views/groups.py
+++ b/wagtail/users/views/groups.py
@@ -158,6 +158,7 @@ class GroupViewSet(ModelViewSet):
     icon = "group"
     model = Group
     add_to_reference_index = False
+    _show_breadcrumbs = False
 
     index_view_class = IndexView
     add_view_class = CreateView