"From Helvetica to San Francisco" is a free Chrome extension developed by Yamato Iizuka. This add-on allows users to replace the fonts Helvetica, Arial, and Roboto with San Francisco, the system font for OS X El Capitan. The extension is specifically designed for users with OS Xor later.

With this extension, users can enjoy a consistent and visually appealing browsing experience by having San Francisco as the default font on web pages. By replacing the commonly used fonts, the extension aims to provide a unified and modern look across different websites.

However, it is important to note that there have been reports of the extension not running properly on certain web pages. The developer has acknowledged this issue and has expressed their intention to fix it. Despite this drawback, "From Helvetica to San Francisco" offers a convenient solution for users who prefer the San Francisco font and want a more cohesive browsing experience on their Chrome browser.