--- a/services/sync/modules/browserid_identity.js
+++ b/services/sync/modules/browserid_identity.js
@@ -29,17 +29,16 @@ XPCOMUtils.defineLazyModuleGetter(this, 
 XPCOMUtils.defineLazyModuleGetter(this, "BulkKeyBundle",
                                   "resource://services-sync/keys.js");
 
 XPCOMUtils.defineLazyModuleGetter(this, "fxAccounts",
                                   "resource://gre/modules/FxAccounts.jsm");
 
 XPCOMUtils.defineLazyGetter(this, 'log', function() {
   let log = Log.repository.getLogger("Sync.BrowserIDManager");
-  log.addAppender(new Log.DumpAppender());
   log.level = Log.Level[Svc.Prefs.get("log.logger.identity")] || Log.Level.Error;
   return log;
 });
 
 // FxAccountsCommon.js doesn't use a "namespace", so create one here.
 let fxAccountsCommon = {};
 Cu.import("resource://gre/modules/FxAccountsCommon.js", fxAccountsCommon);
 

--- a/services/sync/services-sync.js
+++ b/services/sync/services-sync.js
@@ -64,15 +64,16 @@ pref("services.sync.log.logger.engine.bo
 pref("services.sync.log.logger.engine.clients", "Debug");
 pref("services.sync.log.logger.engine.forms", "Debug");
 pref("services.sync.log.logger.engine.history", "Debug");
 pref("services.sync.log.logger.engine.passwords", "Debug");
 pref("services.sync.log.logger.engine.prefs", "Debug");
 pref("services.sync.log.logger.engine.tabs", "Debug");
 pref("services.sync.log.logger.engine.addons", "Debug");
 pref("services.sync.log.logger.engine.apps", "Debug");
+pref("services.sync.log.logger.identity", "Debug");
 pref("services.sync.log.logger.userapi", "Debug");
 pref("services.sync.log.cryptoDebug", false);
 
 pref("services.sync.tokenServerURI", "https://token.services.mozilla.com/1.0/sync/1.5");
 
 pref("services.sync.fxa.termsURL", "https://accounts.firefox.com/legal/terms");
 pref("services.sync.fxa.privacyURL", "https://accounts.firefox.com/legal/privacy");