diff --git a/widget/gtk/mozgtk/mozgtk.c b/widget/gtk/mozgtk/mozgtk.c
--- a/widget/gtk/mozgtk/mozgtk.c
+++ b/widget/gtk/mozgtk/mozgtk.c
@@ -66,16 +66,17 @@ STUB(gdk_screen_get_number)
 STUB(gdk_screen_get_resolution)
 STUB(gdk_screen_get_rgba_visual)
 STUB(gdk_screen_get_root_window)
 STUB(gdk_screen_get_system_visual)
 STUB(gdk_screen_get_width)
 STUB(gdk_screen_height)
 STUB(gdk_screen_is_composited)
 STUB(gdk_screen_width)
+STUB(gdk_selection_owner_get)
 STUB(gdk_set_program_class)
 STUB(gdk_unicode_to_keyval)
 STUB(gdk_visual_get_depth)
 STUB(gdk_visual_get_system)
 STUB(gdk_window_add_filter)
 STUB(gdk_window_begin_move_drag)
 STUB(gdk_window_begin_resize_drag)
 STUB(gdk_window_destroy)
diff --git a/widget/gtk/nsClipboardWayland.cpp b/widget/gtk/nsClipboardWayland.cpp
--- a/widget/gtk/nsClipboardWayland.cpp
+++ b/widget/gtk/nsClipboardWayland.cpp
@@ -337,21 +346,68 @@ nsRetrievalContextWayland::GetTargets(in
     for (int32_t j = 0; j < length; j++) {
         targetList[j] = mTargetMIMETypes[j];
     }
 
     *aTargetNum = length;
     return targetList;
 }
 
+struct fastTrackClipboardData
+{
+    char* data;
+    int   dataLength;
+};
+
+static void
+wayland_clipboard_contents_received(GtkClipboard     *clipboard,
+                                    GtkSelectionData *selection_data,
+                                    gpointer          data)
+{
+    fastTrackClipboardData* clipboardData =
+        static_cast<fastTrackClipboardData*>(data);
+
+    int contentLength = gtk_selection_data_get_length(selection_data);
+    if (contentLength > 0) {
+        clipboardData->data = reinterpret_cast<char*>(
+            g_malloc(sizeof(char)*contentLength));
+        memcpy(clipboardData->data,
+               gtk_selection_data_get_data(selection_data),
+               sizeof(char)*contentLength);
+    }
+
+    clipboardData->dataLength = contentLength;
+}
+
 const char*
 nsRetrievalContextWayland::GetClipboardData(const char* aMimeType,
                                             int32_t aWhichClipboard,
                                             uint32_t* aContentLength)
 {
+    /* If actual clipboard data is owned by us we don't need to go
+     * through Wayland but we ask Gtk+ to directly call data
+     * getter callback nsClipboard::SelectionGetEvent().
+     */
+    GdkAtom selection = GetSelectionAtom(aWhichClipboard);
+    if (gdk_selection_owner_get(selection)) {
+        fastTrackClipboardData clipboardData = { nullptr, 0 };
+        gtk_clipboard_request_contents(gtk_clipboard_get(selection),
+                                       gdk_atom_intern(aMimeType, FALSE),
+                                       wayland_clipboard_contents_received,
+                                       &clipboardData);
+        *aContentLength = clipboardData.dataLength;
+        return static_cast<const char*>(clipboardData.data);
+    }
+
+    /* TODO: We need to implement GDK_SELECTION_PRIMARY (X11 text selection)
+     * for Wayland backend.
+     */
+    if (selection == GDK_SELECTION_PRIMARY)
+         return nullptr;
+
     NS_ASSERTION(mDataOffer, "Requested data without valid data offer!");
 
     if (!mDataOffer) {
         // TODO
         // Something went wrong. We're requested to provide clipboard data
         // but we haven't got any from wayland. Looks like rhbz#1455915.
         return nullptr;
     }