Gmail Notifier restartless is a Firefox extension designed to enhance email management by providing notifications for incoming messages across multiple Google Mail accounts. This subscription-based tool operates under the Security & Privacy category, specifically focusing on anti-spam and anti-spy functionalities. Key features include no requirement for user credentials, support for multiple accounts and labels, and low bandwidth usage thanks to its RSS technology. Users can mark messages as read, report spam, or archive emails directly from the browser's toolbar, streamlining email handling without needing to open Gmail.

This extension has undergone updates to align with WebExtensions API limitations, which has resulted in the removal of certain features like middle-click functionality and taskbar notifications. Despite these changes, users can still receive unread message alerts in the Windows taskbar notification area. The source code is accessible on GitHub, allowing for transparency and community support. For additional assistance, a comprehensive FAQ section is available to address common inquiries regarding account management and notification settings.