ChromeOS CustomBack is a free Chrome extension developed by SupeChicken666. This tool falls under the category of Browsers, specifically in the Add-ons & Tools subcategory. It offers users the ability to customize the background image for Chrome/ChromeOS built-in pages and apps. To utilize this extension effectively, users need to enable the 'Extensions on chrome:// URLs' flag.

With ChromeOS CustomBack, you can personalize the background of various Chrome/ChromeOS components such as the ChromeOS Files App, Diagnostics App, history tab, and bookmarks tab. This customization adds a personal touch to your browsing experience, allowing you to tailor the visual aesthetics of your Chrome experience.