Hi, is the problem on your Firefox for Windows or Firefox for iOS (iPhone/iPad)? ''For Windows:'' If a new Colorways theme doesn't suit you, you can switch themes on the Add-ons page. More information in the following article: [[Use themes to change the look of Firefox]]. In case it's helpful, the theme used when you first install Firefox usually is called "System". If you had installed a theme from the Add-ons store, it still should be an option on the Themes section of the Add-ons page. Can you get Firefox looking the way you like?