diff --git a/static/404.png b/static/404.png
new file mode 100644
index 000000000..deeb83f8f
Binary files /dev/null and b/static/404.png differ
diff --git a/views/settingsgeneral.html b/views/settingsgeneral.html
index d61d5dc6c..b9bddf996 100644
--- a/views/settingsgeneral.html
+++ b/views/settingsgeneral.html
@@ -287,6 +287,14 @@
 {% block tail %}
     <script>
         $(document).ready(function () {
+            // Show warning if there's unsaved changes in the settings_form
+            var form_changed = false;
+            $(window).on('beforeunload', function() {
+                if (form_changed) {
+                    return "";
+                }
+            });
+
             // Hide checkmark over save button
             $('#save_button_checkmark').hide();
 
@@ -342,6 +350,7 @@
                     type: 'POST',
                     complete: function () {
                         $('#save_button_checkmark').show();
+                        form_changed = false;
                         setTimeout(
                             function()
                             {
@@ -361,5 +370,10 @@
             }
             $( "#settings-auth-apikey" ).val( result );
         }
+
+        // monitor changes to the settings_form
+        $('#settings_form').on('change', function() {
+            form_changed = true;
+        })
     </script>
 {% endblock tail %}
diff --git a/views/settingslanguages.html b/views/settingslanguages.html
index 6326a27e9..bdf246215 100644
--- a/views/settingslanguages.html
+++ b/views/settingslanguages.html
@@ -159,6 +159,14 @@
         $(document).ready(function () {
             getLanguages();
 
+            // Show warning if there's unsaved changes in the settings_form
+            var form_changed = false;
+            $(window).on('beforeunload', function() {
+                if (form_changed) {
+                    return "";
+                }
+            });
+
             // Hide checkmark over save button
             $('#save_button_checkmark').hide();
 
@@ -262,6 +270,7 @@
                     type: 'POST',
                     complete: function () {
                         $('#save_button_checkmark').show();
+                        form_changed = false;
                         setTimeout(
                             function()
                             {
@@ -297,6 +306,11 @@
                     }
                 });
             }
+
+            // monitor changes to the settings_form
+            $('#settings_form').on('change', function() {
+                form_changed = true;
+            })
         });
     </script>
 {% endblock tail %}
diff --git a/views/settingsproviders.html b/views/settingsproviders.html
index 9cd85f6b7..c92f69740 100644
--- a/views/settingsproviders.html
+++ b/views/settingsproviders.html
@@ -649,6 +649,14 @@
 {% block tail %}
     <script>
         $(document).ready(function () {
+            // Show warning if there's unsaved changes in the settings_form
+            var form_changed = false;
+            $(window).on('beforeunload', function() {
+                if (form_changed) {
+                    return "";
+                }
+            });
+
             // Hide checkmark over save button
             $('#save_button_checkmark').hide();
 
@@ -696,6 +704,7 @@
                     type: 'POST',
                     complete: function () {
                         $('#save_button_checkmark').show();
+                        form_changed = false;
                         setTimeout(
                             function()
                             {
@@ -704,6 +713,11 @@
                     }
                 });
             });
+
+            // monitor changes to the settings_form
+            $('#settings_form').on('change', function() {
+                form_changed = true;
+            })
         });
     </script>
 {% endblock tail %}
diff --git a/views/settingsradarr.html b/views/settingsradarr.html
index 7f1febaf6..2d0bbfb23 100644
--- a/views/settingsradarr.html
+++ b/views/settingsradarr.html
@@ -243,6 +243,14 @@
 {% block tail %}
     <script>
         $(document).ready(function () {
+            // Show warning if there's unsaved changes in the settings_form
+            var form_changed = false;
+            $(window).on('beforeunload', function() {
+                if (form_changed) {
+                    return "";
+                }
+            });
+
             // Hide checkmark over save button
             $('#save_button_checkmark').hide();
 
@@ -278,6 +286,7 @@
                     type: 'POST',
                     complete: function () {
                         $('#save_button_checkmark').show();
+                        form_changed = false;
                         setTimeout(
                             function()
                             {
@@ -375,6 +384,11 @@
                     }
                 });
             });
+
+            // monitor changes to the settings_form
+            $('#settings_form').on('change', function() {
+                form_changed = true;
+            })
         });
     </script>
 {% endblock tail %}
diff --git a/views/settingssonarr.html b/views/settingssonarr.html
index a16210dc2..5490de987 100644
--- a/views/settingssonarr.html
+++ b/views/settingssonarr.html
@@ -243,6 +243,14 @@
 {% block tail %}
     <script>
         $(document).ready(function () {
+            // Show warning if there's unsaved changes in the settings_form
+            var form_changed = false;
+            $(window).on('beforeunload', function() {
+                if (form_changed) {
+                    return "";
+                }
+            });
+
             // Hide checkmark over save button
             $('#save_button_checkmark').hide();
 
@@ -278,6 +286,7 @@
                     type: 'POST',
                     complete: function () {
                         $('#save_button_checkmark').show();
+                        form_changed = false;
                         setTimeout(
                             function()
                             {
@@ -375,6 +384,11 @@
                     }
                 });
             });
+
+            // monitor changes to the settings_form
+            $('#settings_form').on('change', function() {
+                form_changed = true;
+            })
         });
     </script>
 {% endblock tail %}
diff --git a/views/settingssubtitles.html b/views/settingssubtitles.html
index e98b5fac5..ad29547b9 100644
--- a/views/settingssubtitles.html
+++ b/views/settingssubtitles.html
@@ -297,6 +297,14 @@
 {% block tail %}
     <script>
         $(document).ready(function () {
+            // Show warning if there's unsaved changes in the settings_form
+            var form_changed = false;
+            $(window).on('beforeunload', function() {
+                if (form_changed) {
+                    return "";
+                }
+            });
+
             // Hide checkmark over save button
             $('#save_button_checkmark').hide();
 
@@ -386,6 +394,7 @@
                     type: 'POST',
                     complete: function () {
                         $('#save_button_checkmark').show();
+                        form_changed = false;
                         setTimeout(
                             function()
                             {
@@ -394,6 +403,11 @@
                     }
                 });
             });
+
+            // monitor changes to the settings_form
+            $('#settings_form').on('change', function() {
+                form_changed = true;
+            })
         });
     </script>
 {% endblock tail %}