Gmail Mono is a Chrome add-on developed by masaki.furuta. This free program falls under the category of Browsers, specifically Add-ons & Tools. Its main purpose is to change the display of plain-text mails and the compose window in Gmail, applying a monospace font.

With Gmail Mono, users can enjoy improved readability and a more aesthetically pleasing experience when dealing with plain-text emails. The add-on achieves this by overriding the default font settings and applying a monospace font to both the editable text areas and the subject line. By using a monospace font, the add-on ensures that each character occupies the same amount of space, resulting in a cleaner and more organized appearance.

Gmail Mono is a simple and lightweight add-on that seamlessly integrates into the Gmail interface. It requires no complex setup or configuration, making it accessible to users of all skill levels. If you frequently work with plain-text emails and desire a more visually appealing experience, Gmail Mono is an excellent choice.