Dark mode does not work properly on Firefox Developer Edition

[zzy-life]

Environment

https://nuxt.com/

Reproduction

Use Google and Firefox to open https://nuxt.com/, and you can find that the automatic recognition on Firefox is wrong, showing the dark mode

Describe the bug

firefox Developer Edition 131.0b5
And how to turn off dark mode?
I tried but it didn't work
colorMode: {
preference: 'light'
},

Additional context

No response

Logs

No response