gmail-fixed-font

A user script that applies the browser's monospace font to message body text and compose window in Gmail.

Installation

Chrome and Firefox

1. Install Tampermokey (Chrome) or Greasemonkey (Firefox)
2. Click to install

Userscripts.org

The original version of this script appeared on userscripts.org:

• http://userscripts.org/scripts/show/17869
• https://userscripts-mirror.org/scripts/show/17869

Stylish

There's also a CSS version for use with Stylus and Stylish:

• https://userstyles.org/styles/163466/gmail-fixed-font