Gmail Archive URL is a free Chrome add-on developed by lfaraone. It falls under the category of Browsers, specifically Add-ons & Tools. This program allows users to automatically determine if a permanent link to a web archive can be obtained for a given message.

With Gmail Archive URL, users can easily find permanent links to mailing list mail. The add-on supports various types of mailing lists, including Google Groups and Debian. Some mailing lists have public archives that include the message's permalink in the List-Archive header, while others provide message-ID-based searches. This extension is designed to handle these different types and provide users with either a public link or the message ID itself.