[pcr910303]

I'm pretty sure it's b.c. you have dark mode turned on & the CSS didn't consider code snippets.

Try turning them off, it'll look much better.

[jeltz]

Thanks, it is better now but still not very good.

[Mathnerd314]

ui.systemUsesDarkTheme = 0 for FF users.

[mercora]

I use "widget.content.gtk-theme-override;Adwaita:light" to fix commonly invalid assumptions about default colors and appearances.

It overrides the GTK theme used to render page content and still allows to use a dark theme (or whatever you want) for UI components.