diff --git a/Userland/Libraries/LibWeb/HTML/Navigable.cpp b/Userland/Libraries/LibWeb/HTML/Navigable.cpp
index 84bd71e329e..28a8435ce57 100644
--- a/Userland/Libraries/LibWeb/HTML/Navigable.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Navigable.cpp
@@ -649,7 +649,7 @@ static WebIDL::ExceptionOr<Optional<NavigationParams>> create_navigation_params_
 }
 
 // https://html.spec.whatwg.org/multipage/browsing-the-web.html#attempt-to-populate-the-history-entry's-document
-WebIDL::ExceptionOr<void> Navigable::populate_session_history_entry_document(JS::GCPtr<SessionHistoryEntry> entry, Optional<NavigationParams> navigation_params, Optional<String> navigation_id, SourceSnapshotParams const& source_snapshot_params, Function<void()> completion_steps)
+WebIDL::ExceptionOr<void> Navigable::populate_session_history_entry_document(JS::GCPtr<SessionHistoryEntry> entry, Optional<NavigationParams> navigation_params, Optional<String> navigation_id, SourceSnapshotParams const& source_snapshot_params, bool allow_POST, Function<void()> completion_steps)
 {
     // FIXME: 1. Assert: this is running in parallel.
 
@@ -673,8 +673,8 @@ WebIDL::ExceptionOr<void> Navigable::populate_session_history_entry_document(JS:
         }
         // 2. Otherwise, if both of the following are true:
         //    - entry's URL's scheme is a fetch scheme; and
-        //    - documentResource is null, FIXME: or allowPOST is true and documentResource's request body is not failure
-        else if (Fetch::Infrastructure::is_fetch_scheme(entry->url.scheme()) && document_resource.has<Empty>()) {
+        //    - documentResource is null, or allowPOST is true and documentResource's request body is not failure (FIXME: check if request body is not failure)
+        else if (Fetch::Infrastructure::is_fetch_scheme(entry->url.scheme()) && (document_resource.has<Empty>() || allow_POST)) {
             navigation_params = create_navigation_params_by_fetching(entry, this, source_snapshot_params, navigation_id).release_value_but_fixme_should_propagate_errors();
         }
         // FIXME: 3. Otherwise, if entry's URL's scheme is not a fetch scheme, then set navigationParams to a new non-fetch scheme navigation params, with
@@ -939,7 +939,7 @@ WebIDL::ExceptionOr<void> Navigable::navigate(
         //     for historyEntry, given navigable, "navigate", sourceSnapshotParams,
         //     targetSnapshotParams, navigationId, navigationParams, cspNavigationType, with allowPOST
         //     set to true and completionSteps set to the following step:
-        populate_session_history_entry_document(history_entry, navigation_params, navigation_id, source_snapshot_params, [this, history_entry, history_handling, navigation_id] {
+        populate_session_history_entry_document(history_entry, navigation_params, navigation_id, source_snapshot_params, true, [this, history_entry, history_handling, navigation_id] {
             traversable_navigable()->append_session_history_traversal_steps([this, history_entry, history_handling, navigation_id] {
                 // https://html.spec.whatwg.org/multipage/browsing-the-web.html#finalize-a-cross-document-navigation
 
diff --git a/Userland/Libraries/LibWeb/HTML/Navigable.h b/Userland/Libraries/LibWeb/HTML/Navigable.h
index 76a9d5b2557..32bd6eed2af 100644
--- a/Userland/Libraries/LibWeb/HTML/Navigable.h
+++ b/Userland/Libraries/LibWeb/HTML/Navigable.h
@@ -86,7 +86,7 @@ public:
 
     Variant<Empty, Traversal, String> ongoing_navigation() const { return m_ongoing_navigation; }
 
-    WebIDL::ExceptionOr<void> populate_session_history_entry_document(JS::GCPtr<SessionHistoryEntry>, Optional<NavigationParams>, Optional<String> navigation_id, SourceSnapshotParams const&, Function<void()>);
+    WebIDL::ExceptionOr<void> populate_session_history_entry_document(JS::GCPtr<SessionHistoryEntry>, Optional<NavigationParams>, Optional<String> navigation_id, SourceSnapshotParams const&, bool allow_POST, Function<void()>);
 
     WebIDL::ExceptionOr<void> navigate(
         AK::URL const&,
diff --git a/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp b/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp
index 822d1a65d1e..d8f652c3cbd 100644
--- a/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp
+++ b/Userland/Libraries/LibWeb/HTML/TraversableNavigable.cpp
@@ -341,12 +341,13 @@ void TraversableNavigable::apply_the_history_step(int step, Optional<SourceSnaps
                 // 5. Set targetEntry's document state's reload pending to false.
                 target_entry->document_state->set_reload_pending(false);
 
-                // FIXME: 6. Let allowPOST be targetEntry's document state's reload pending.
+                // 6. Let allowPOST be targetEntry's document state's reload pending.
+                auto allow_POST = target_entry->document_state->reload_pending();
 
                 // 7. In parallel, attempt to populate the history entry's document for targetEntry, given navigable, potentiallyTargetSpecificSourceSnapshotParams,
                 //    targetSnapshotParams, with allowPOST set to allowPOST and completionSteps set to queue a global task on the navigation and traversal task source given
                 //    navigable's active window to run afterDocumentPopulated.
-                navigable->populate_session_history_entry_document(target_entry, {}, {}, *potentially_target_specific_source_snapshot_params, [this, after_document_populated]() mutable {
+                navigable->populate_session_history_entry_document(target_entry, {}, {}, *potentially_target_specific_source_snapshot_params, allow_POST, [this, after_document_populated]() mutable {
                              queue_global_task(Task::Source::NavigationAndTraversal, *active_window(), [after_document_populated]() mutable {
                                  after_document_populated();
                              });