--- a/toolkit/components/extensions/ExtensionStorageSync.jsm
+++ b/toolkit/components/extensions/ExtensionStorageSync.jsm
@@ -390,17 +390,17 @@ if (AppConstants.platform != "android") 
 
 this.ExtensionStorageSync = {
   _fxaService,
   listeners: new WeakMap(),
 
   syncAll: Task.async(function* () {
     const extensions = extensionContexts.keys();
     const extIds = Array.from(extensions, extension => extension.id);
-    log.debug(`Syncing extension settings for ${JSON.stringify(extIds)}\n`);
+    log.debug(`Syncing extension settings for ${JSON.stringify(extIds)}`);
     if (extIds.length == 0) {
       // No extensions to sync. Get out.
       return;
     }
     yield this.ensureKeysFor(extIds);
     yield this.checkSyncKeyRing();
     const promises = Array.from(extensionContexts.keys(), extension => {
       return openCollection(extension).then(coll => {