Hi, you can change your overall toolbar theme, which affects other parts of the browser, from the Add-ons page. See: [[Use themes to change the look of Firefox]]. Once you find a theme that makes the toolbars the colors you want, you can change built-in pages and influence web pages using the Web Appearance selectors: [[Change web appearance settings in Firefox]]. But if Firefox is insisting on mimicking a system-level high contrast theme, that may conflict with other settings. Here's how to turn it off: [[Disable high contrast mode in Firefox]]. Can you get the colors working the way you want?