diff --git a/services/sync/locales/en-US/log.dtd b/services/sync/locales/en-US/log.dtd
deleted file mode 100644
index 9b980e94d523..000000000000
--- a/services/sync/locales/en-US/log.dtd
+++ /dev/null
@@ -1,3 +0,0 @@
-<!ENTITY dialog.title         "Mozilla Weave Sync - Activity Log">
-<!ENTITY saveAsButton.label   "Save As...">
-<!ENTITY clearButton.label    "Clear Logs">
diff --git a/services/sync/locales/en-US/log.properties b/services/sync/locales/en-US/log.properties
deleted file mode 100644
index de6b5673aa5a..000000000000
--- a/services/sync/locales/en-US/log.properties
+++ /dev/null
@@ -1,2 +0,0 @@
-noLogAvailable.alert  = No log available
-filePicker.title      = Choose Destination File
diff --git a/services/sync/modules/service.js b/services/sync/modules/service.js
index d20d36d7af59..8f9d302fe6d1 100644
--- a/services/sync/modules/service.js
+++ b/services/sync/modules/service.js
@@ -335,7 +335,8 @@ WeaveSvc.prototype = {
     if (!verbose.exists())
       verbose.create(verbose.NORMAL_FILE_TYPE, PERMS_FILE);
 
-    this._debugApp = new Log4Moz.RotatingFileAppender(verbose, formatter);
+    let maxSize = 65536; // 64 * 1024 (64KB)
+    this._debugApp = new Log4Moz.RotatingFileAppender(verbose, formatter, maxSize);
     this._debugApp.level = Log4Moz.Level[Svc.Prefs.get("log.appender.debugLog")];
     root.addAppender(this._debugApp);
   },
diff --git a/services/sync/modules/util.js b/services/sync/modules/util.js
index 643930010a21..10d1c1e2fa1b 100644
--- a/services/sync/modules/util.js
+++ b/services/sync/modules/util.js
@@ -724,10 +724,6 @@ let Utils = {
     this.openDialog("ChangeSomething", "generic-change.xul");
   },
 
-  openLog: function Utils_openLog() {
-    Utils._openChromeWindow("Log", "log.xul");
-  },
-
   getErrorString: function Utils_getErrorString(error, args) {
     try {
       return Str.errors.get(error, args || null);