Where to change Theme?
Where can I change to white background colour and to black characters from the black background and white characters?
Where can I change to white background colour and to black characters from the black background and white characters?
Alla svar (1)
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 website 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?