diff --git a/src/zen/sessionstore/SessionComponents.manifest b/src/zen/sessionstore/SessionComponents.manifest
index 9da9dc105..8e3b0f9b0 100644
--- a/src/zen/sessionstore/SessionComponents.manifest
+++ b/src/zen/sessionstore/SessionComponents.manifest
@@ -7,5 +7,4 @@ category browser-before-ui-startup resource:///modules/zen/ZenSessionManager.sys
 category browser-before-ui-startup resource:///modules/zen/ZenWindowSync.sys.mjs ZenWindowSync.init
 
 # App shutdown consumers
-category browser-quit-application-granted resource:///modules/zen/ZenSessionManager.sys.mjs ZenSessionStore.uninit
 category browser-quit-application-granted resource:///modules/zen/ZenWindowSync.sys.mjs ZenWindowSync.uninit
diff --git a/src/zen/sessionstore/ZenSessionManager.sys.mjs b/src/zen/sessionstore/ZenSessionManager.sys.mjs
index 3df1885a7..01f8d1aac 100644
--- a/src/zen/sessionstore/ZenSessionManager.sys.mjs
+++ b/src/zen/sessionstore/ZenSessionManager.sys.mjs
@@ -93,12 +93,6 @@ export class nsZenSessionManager {
     }, REGENERATION_DEBOUNCE_RATE_MS);
   }
 
-  uninit() {
-    this.log('Uninitializing session manager');
-    this.#deferredBackupTask?.disarm();
-    this.#deferredBackupTask = null;
-  }
-
   log(...args) {
     if (lazy.gShouldLog) {
       console.info('ZenSessionManager:', ...args);