diff --git a/quickshell/services/python/theme_sync.py b/quickshell/services/python/theme_sync.py
index b77a279..c12c6de 100644
--- a/quickshell/services/python/theme_sync.py
+++ b/quickshell/services/python/theme_sync.py
@@ -50,6 +50,67 @@ def get_app_config_dirs(app_names):
 
     return list(dirs)
 
+def restart_app_if_running(name, search_patterns, launch_commands):
+    """
+    Gracefully restarts a native or Flatpak application if it is currently running.
+    """
+    import subprocess, time
+
+    is_running = False
+    for pat in search_patterns:
+        res = subprocess.run(["pgrep", "-i", "-f", pat], capture_output=True, text=True)
+        if res.returncode == 0:
+            is_running = True
+            break
+
+    if not is_running:
+        return
+
+    # Gracefully terminate running instances
+    for pat in search_patterns:
+        subprocess.run(["pkill", "-15", "-i", "-f", pat], capture_output=True)
+
+    # Wait for process exit & lock release buffer
+    for _ in range(30):
+        still_running = False
+        for pat in search_patterns:
+            check = subprocess.run(["pgrep", "-i", "-f", pat], capture_output=True, text=True)
+            if check.returncode == 0:
+                still_running = True
+                break
+        if not still_running:
+            time.sleep(0.5)
+            break
+        time.sleep(0.1)
+
+    # Launch using first available working launch command (Flatpak -> Desktop launcher -> Native binary)
+    for cmd in launch_commands:
+        try:
+            if cmd.startswith("flatpak run"):
+                app_id = cmd.split()[-1]
+                check_fp = subprocess.run(["flatpak", "info", app_id], capture_output=True, text=True)
+                if check_fp.returncode == 0:
+                    subprocess.Popen(cmd, shell=True, start_new_session=True)
+                    return
+            elif cmd.startswith("gtk-launch"):
+                app_id = cmd.split()[-1]
+                res_gtk = subprocess.run(["gtk-launch", app_id], capture_output=True)
+                if res_gtk.returncode == 0:
+                    return
+            else:
+                bin_name = cmd.split()[0]
+                res_bin = subprocess.run(f"command -v {bin_name}", capture_output=True, shell=True)
+                if res_bin.returncode == 0:
+                    subprocess.Popen(cmd, shell=True, start_new_session=True)
+                    return
+        except Exception:
+            pass
+
+    # Generic shell fallback launch
+    if launch_commands:
+        raw_cmd = " || ".join(launch_commands)
+        subprocess.Popen(f"sh -c '{raw_cmd} &'", shell=True, start_new_session=True)
+
 def sync_gtk(bg, surface, current_line, fg, accent, is_dark):
     css_content = f"""/* Auto-generated by Quickshell Theme Engine */
 @define-color window_bg_color {bg};
@@ -651,18 +712,20 @@ tab[selected="true"] {{
                     except Exception:
                         pass
 
-    # Graceful SIGTERM restart with profile lock release buffer
-    res = subprocess.run(["pgrep", "-f", "zen-browser"], capture_output=True, text=True)
-    if res.returncode == 0:
-        subprocess.run(["pkill", "-15", "-f", "zen-browser"])
-        import time
-        for _ in range(30):
-            check = subprocess.run(["pgrep", "-f", "zen-browser"], capture_output=True, text=True)
-            if check.returncode != 0:
-                time.sleep(0.6)  # Safety buffer for lock release
-                break
-            time.sleep(0.1)
-        subprocess.Popen(["zen-browser"], start_new_session=True)
+    restart_app_if_running(
+        "zen",
+        ["zen-browser", "zen-bin", "zen_browser", "app.zen_browser.zen", "io.github.zen_browser.zen"],
+        [
+            "flatpak run app.zen_browser.zen",
+            "flatpak run io.github.zen_browser.zen",
+            "gtk-launch app.zen_browser.zen",
+            "gtk-launch io.github.zen_browser.zen",
+            "gtk-launch zen-browser",
+            "zen-browser",
+            "zen-bin",
+            "zen"
+        ]
+    )
 
 def hex_to_rgb(hex_str):
     try:
@@ -811,6 +874,18 @@ def sync_feishin(bg, surface, current_line, fg, accent, sub_accent, is_dark, var
         except Exception:
             pass
 
+    restart_app_if_running(
+        "feishin",
+        ["feishin", "io.github.jeffvli.feishin", "org.jeffvli.feishin"],
+        [
+            "flatpak run io.github.jeffvli.feishin",
+            "flatpak run org.jeffvli.feishin",
+            "gtk-launch io.github.jeffvli.feishin",
+            "gtk-launch feishin",
+            "feishin"
+        ]
+    )
+
 def sync_starship(bg, surface, current_line, fg, accent, sub_accent, is_dark):
     starship_dir = os.path.expanduser('~/.config')
     os.makedirs(starship_dir, exist_ok=True)