diff --git a/global/theme.js b/global/theme.js
index bce6964..2f5c6b9 100644
--- a/global/theme.js
+++ b/global/theme.js
@@ -3,7 +3,6 @@
     try {
       document.documentElement.setAttribute("data-theme", theme);
       await storageManager.set("themePreference", theme);
-      localStorage.setItem("themePreference", theme);
       chrome.runtime
         .sendMessage({
           action: "themeChanged",
@@ -103,22 +102,11 @@
 
   async function initializeTheme() {
     try {
-      const storageTheme = await storageManager.get("themePreference");
-      const localStorageTheme = localStorage.getItem("themePreference");
-
-      const theme = storageTheme || localStorageTheme || "light-green";
+      const theme = await storageManager.get("themePreference", "light-green");
 
       await setTheme(theme);
       setPageTitleAndFavicon();
       importFonts();
-
-      if (storageTheme !== localStorageTheme) {
-        if (storageTheme) {
-          localStorage.setItem("themePreference", storageTheme);
-        } else if (localStorageTheme) {
-          await storageManager.set("themePreference", localStorageTheme);
-        }
-      }
     } catch (error) {
       console.error("Error initializing theme:", error);
       await setTheme("light-green");
@@ -154,8 +142,7 @@
     const currentTheme = document.documentElement.getAttribute("data-theme");
     
     try {
-      const savedTheme = await storageManager.get("themePreference") ||
-        localStorage.getItem("themePreference");
+      const savedTheme = await storageManager.get("themePreference");
 
       if (
         (!currentTheme && savedTheme) ||
diff --git a/login/twofactor.js b/login/twofactor.js
index bb98ae5..b925b07 100644
--- a/login/twofactor.js
+++ b/login/twofactor.js
@@ -104,10 +104,8 @@ async function transformTwoFactorPage() {
 
 function applyTheme() {
   try {
-    if (typeof getCookie === "function") {
-      const theme = getCookie("theme") || "light-green";
-      document.documentElement.setAttribute("data-theme", theme);
-    }
+    const theme = localStorage.getItem("themePreference") || "light-green";
+    document.documentElement.setAttribute("data-theme", theme);
   } catch (error) {
   }
 }
diff --git a/settings/index.html b/settings/index.html
index f5d4996..e958160 100644
--- a/settings/index.html
+++ b/settings/index.html
@@ -226,11 +226,10 @@
     </div>
 
     <footer class="popup-footer">
-      <div class="version-info" id="version">v1.1.0</div>
+      <div class="version-info" id="version">v1.3.0</div>
     </footer>
   </div>
   <script src="../tools/storageManager.js"></script>
-  <script src="../tools/cookieManager.js"></script>
     <script src="../global/language.js"></script>
     <script src="index.js"></script>
 </body>
diff --git a/settings/index.js b/settings/index.js
index 8d681a0..4c5d267 100644
--- a/settings/index.js
+++ b/settings/index.js
@@ -3,38 +3,9 @@ document.addEventListener("DOMContentLoaded", async () => {
     await new Promise((resolve) => setTimeout(resolve, 10));
   }
 
-
-
-
-
-  function getCookie(name) {
-    const cookieName = `${name}=`;
-    const decodedCookie = decodeURIComponent(document.cookie);
-    const cookieArray = decodedCookie.split(";");
-
-    for (let i = 0; i < cookieArray.length; i++) {
-      let cookie = cookieArray[i];
-      while (cookie.charAt(0) === " ") {
-        cookie = cookie.substring(1);
-      }
-      if (cookie.indexOf(cookieName) === 0) {
-        return cookie.substring(cookieName.length, cookie.length);
-      }
-    }
-    return null;
-  }
-
-  function setCookie(name, value, days = 365) {
-    const date = new Date();
-    date.setTime(date.getTime() + days * 24 * 60 * 60 * 1000);
-    const expires = `expires=${date.toUTCString()}`;
-    document.cookie = `${name}=${value}; ${expires}; path=/; domain=.e-kreta.hu`;
-  }
-
   function getCurrentTheme() {
     return (
       localStorage.getItem("themePreference") ||
-      getCookie("themePreference") ||
       "light-green"
     );
   }
@@ -50,7 +21,6 @@ document.addEventListener("DOMContentLoaded", async () => {
   function getCurrentLanguage() {
     return (
       localStorage.getItem("languagePreference") ||
-      getCookie("languagePreference") ||
       "hu"
     );
   }
@@ -63,7 +33,6 @@ document.addEventListener("DOMContentLoaded", async () => {
   }
 
   async function applyLanguage(language) {
-    setCookie("languagePreference", language);
     localStorage.setItem("languagePreference", language);
 
     updateLanguageButtons(language);
@@ -80,7 +49,6 @@ document.addEventListener("DOMContentLoaded", async () => {
   }
 
   async function applyTheme(theme) {
-    setCookie("themePreference", theme);
     localStorage.setItem("themePreference", theme);
 
     document.documentElement.setAttribute("data-theme", theme);
@@ -142,8 +110,6 @@ document.addEventListener("DOMContentLoaded", async () => {
   const versionElement = document.getElementById("version");
   versionElement.textContent = `v${manifest.version}`;
 
-
-
   themeButtons.forEach((button) => {
     button.addEventListener("mouseover", () => {
       if (!button.hasAttribute("disabled")) {
@@ -233,12 +199,10 @@ document.addEventListener("DOMContentLoaded", async () => {
         const theme = this.customThemes.find(t => t.id === themeId);
         if (theme) {
           this.applyCustomThemeColors(theme.colors);
-          setCookie("themePreference", themeId);
           localStorage.setItem("themePreference", themeId);
         }
       } else {
         document.documentElement.setAttribute('data-theme', themeId);
-        setCookie("themePreference", themeId);
         localStorage.setItem("themePreference", themeId);
       }
       updateThemeButtons(themeId);
diff --git a/tools/storageManager.js b/tools/storageManager.js
index b5d9a27..fd04c1e 100644
--- a/tools/storageManager.js
+++ b/tools/storageManager.js
@@ -33,10 +33,8 @@ const storageManager = {
         localStorage.setItem(prefixedKey, JSON.stringify(value));
       }
     } catch (error) {
-      console.warn(`[StorageManager] Primary storage failed for ${key}, falling back to cookie:`, error);
-      if (typeof cookieManager !== 'undefined') {
-        cookieManager.set(prefixedKey, JSON.stringify(value));
-      }
+      console.warn(`[StorageManager] Storage failed for ${key}:`, error);
+      throw error;
     }
   },
 
@@ -72,17 +70,7 @@ const storageManager = {
         return defaultValue;
       }
     } catch (error) {
-      console.warn(`[StorageManager] Primary storage failed for ${key}, falling back to cookie:`, error);
-      if (typeof cookieManager !== 'undefined') {
-        const cookieValue = cookieManager.get(prefixedKey);
-        if (cookieValue) {
-          try {
-            return JSON.parse(cookieValue);
-          } catch (parseError) {
-            return cookieValue;
-          }
-        }
-      }
+      console.warn(`[StorageManager] Storage failed for ${key}:`, error);
       return defaultValue;
     }
   },
@@ -153,41 +141,4 @@ const storageManager = {
     }
   },
 
-  async migrateFromCookies() {
-    if (typeof cookieManager === 'undefined') {
-      return;
-    }
-
-    const knownSettings = [
-      'theme', 'language', 'notifications', 'autoRefresh', 
-      'compactMode', 'showGrades', 'showAbsences'
-    ];
-
-    let migratedCount = 0;
-    
-    for (const setting of knownSettings) {
-      try {
-        const cookieValue = cookieManager.get(`firka_${setting}`);
-        if (cookieValue !== null) {
-          let value;
-          try {
-            value = JSON.parse(cookieValue);
-          } catch {
-            value = cookieValue;
-          }
-          
-          await this.set(setting, value);
-          migratedCount++;
-        }
-      } catch (error) {
-        console.warn(`[StorageManager] Failed to migrate ${setting}:`, error);
-      }
-    }
-  }
-};
-
-if (typeof document !== 'undefined') {
-  document.addEventListener('DOMContentLoaded', () => {
-    storageManager.migrateFromCookies().catch(console.error);
-  });
-}
\ No newline at end of file
+};
\ No newline at end of file