diff --git a/assets/js/player.js b/assets/js/player.js
index d45ff5d02..5ff55eb3c 100644
--- a/assets/js/player.js
+++ b/assets/js/player.js
@@ -59,6 +59,16 @@ videojs.Hls.xhr.beforeRequest = function(options) {
 
 var player = videojs('player', options);
 
+const storage = (() => {
+    try {
+        if (localStorage.length !== -1) {
+            return localStorage;
+        }
+    } catch (e) {
+        console.info('No storage available: ' + e);
+    }
+    return undefined;
+})();
 
 if (location.pathname.startsWith('/embed/')) {
     player.overlay({
@@ -386,25 +396,35 @@ function get_video_time() {
 }
 
 function set_all_video_times(times) {
-    const json = JSON.stringify(times);
-
-    localStorage.setItem(save_player_pos_key, json);
+    if (storage) {
+        if (times) {
+            try {
+                storage.setItem(save_player_pos_key, JSON.stringify(times));
+            } catch (e) {
+                console.debug('set_all_video_times: ' + e);
+            }
+        } else {
+            storage.removeItem(save_player_pos_key);
+        }
+    }
 }
 
 function get_all_video_times() {
-    try {
-        const raw = localStorage.getItem(save_player_pos_key);
-        const times = JSON.parse(raw);
-
-        return times || {};
-    }
-    catch {
-        return {};
+    if (storage) {
+        const raw = storage.getItem(save_player_pos_key);
+        if (raw !== null) {
+            try {
+                return JSON.parse(raw);
+            } catch (e) {
+                console.debug('get_all_video_times: ' + e);
+            }
+        }
     }
+    return {};
 }
 
 function remove_all_video_times() {
-    localStorage.removeItem(save_player_pos_key);
+    set_all_video_times(null);
 }
 
 function set_time_percent(percent) {
diff --git a/assets/js/themes.js b/assets/js/themes.js
index 543b849e6..470f10bf6 100644
--- a/assets/js/themes.js
+++ b/assets/js/themes.js
@@ -11,7 +11,9 @@ toggle_theme.addEventListener('click', function () {
     xhr.open('GET', url, true);
 
     set_mode(dark_mode);
-    window.localStorage.setItem('dark_mode', dark_mode ? 'dark' : 'light');
+    try {
+        window.localStorage.setItem('dark_mode', dark_mode ? 'dark' : 'light');
+    } catch {}
 
     xhr.send();
 });
@@ -23,9 +25,12 @@ window.addEventListener('storage', function (e) {
 });
 
 window.addEventListener('DOMContentLoaded', function () {
-    window.localStorage.setItem('dark_mode', document.getElementById('dark_mode_pref').textContent);
-    // Update localStorage if dark mode preference changed on preferences page
-    update_mode(window.localStorage.dark_mode);
+    const dark_mode = document.getElementById('dark_mode_pref').textContent;
+    try {
+        // Update localStorage if dark mode preference changed on preferences page
+        window.localStorage.setItem('dark_mode', dark_mode);
+    } catch {}
+    update_mode(dark_mode);
 });
 
 
@@ -37,9 +42,11 @@ lightScheme.addListener(scheme_switch);
 
 function scheme_switch (e) {
   // ignore this method if we have a preference set
-  if (localStorage.getItem('dark_mode')) {
-    return;
-  }
+  try {
+    if (localStorage.getItem('dark_mode')) {
+      return;
+    }
+  } catch {}
   if (e.matches) {
     if (e.media.includes("dark")) {
       set_mode(true);