122 tab highlight color

[operav]

I've removed the tab-line, but it's back on version 122.
Its color can be adjusted through the tab highlight color option of https://color.firefox.com. However, if you use https://color.firefox.com to change the theme, the starry sky animation of "Dark space - The best dynamic theme" will disappear.
Is there any way to remove this tab highlight color? Or change its color to be the same as the tab bar background color.