diff --git a/browser/components/sessionstore/src/nsSessionStore.js b/browser/components/sessionstore/src/nsSessionStore.js
index e600d245cc40..d13431a355b2 100644
--- a/browser/components/sessionstore/src/nsSessionStore.js
+++ b/browser/components/sessionstore/src/nsSessionStore.js
@@ -174,7 +174,7 @@ SessionStoreService.prototype = {
   _loadState: STATE_STOPPED,
 
   // minimal interval between two save operations (in milliseconds)
-  _interval: 10000,
+  _interval: 15000,
 
   // when crash recovery is disabled, session data is not written to disk
   _resume_from_crash: true,