diff --git a/komorebi/src/container.rs b/komorebi/src/container.rs
index e1d9d6df..ec555895 100644
--- a/komorebi/src/container.rs
+++ b/komorebi/src/container.rs
@@ -26,7 +26,7 @@ impl Default for Container {
     }
 }
 
-impl PartialEq for &Container {
+impl PartialEq for Container {
     fn eq(&self, other: &Self) -> bool {
         self.id == other.id
     }
diff --git a/komorebi/src/process_event.rs b/komorebi/src/process_event.rs
index 82f73d33..cc5769cb 100644
--- a/komorebi/src/process_event.rs
+++ b/komorebi/src/process_event.rs
@@ -138,6 +138,27 @@ impl WindowManager {
                     }
                 }
 
+                // There are some applications such as Firefox where, if they are focused when a
+                // workspace switch takes place, it will fire an additional Show event, which will
+                // result in them being associated with both the original workspace and the workspace
+                // being switched to. This loop is to try to ensure that we don't end up with
+                // duplicates across multiple workspaces, as it results in ghost layout tiles.
+                for (i, monitor) in self.monitors().iter().enumerate() {
+                    for (j, workspace) in monitor.workspaces().iter().enumerate() {
+                        if workspace.container_for_window(window.hwnd).is_some()
+                            && i != self.focused_monitor_idx()
+                            && j != monitor.focused_workspace_idx()
+                        {
+                            tracing::debug!(
+                                "ignoring show event for window already associated with another workspace"
+                            );
+
+                            window.hide();
+                            return Ok(());
+                        }
+                    }
+                }
+
                 let workspace = self.focused_workspace_mut()?;
 
                 if workspace.containers().is_empty() || !workspace.contains_window(window.hwnd) {
diff --git a/komorebi/src/workspace.rs b/komorebi/src/workspace.rs
index 8aed25ec..edc79689 100644
--- a/komorebi/src/workspace.rs
+++ b/komorebi/src/workspace.rs
@@ -182,6 +182,10 @@ impl Workspace {
         Ok((hwnds.len() + floating_hwnds.len(), container_ids.len()))
     }
 
+    pub fn container_for_window(&self, hwnd: isize) -> Option<&Container> {
+        self.containers().get(self.container_idx_for_window(hwnd)?)
+    }
+
     pub fn focus_container_by_window(&mut self, hwnd: isize) -> Result<()> {
         let container_idx = self
             .container_idx_for_window(hwnd)
@@ -249,7 +253,7 @@ impl Workspace {
         self.containers_mut().remove(idx)
     }
 
-    fn container_idx_for_window(&mut self, hwnd: isize) -> Option<usize> {
+    fn container_idx_for_window(&self, hwnd: isize) -> Option<usize> {
         let mut idx = None;
         for (i, x) in self.containers().iter().enumerate() {
             if x.contains_window(hwnd) {