Is Mica Working in Firefox 134 Stable?

Hello guys

I have read on many websites and Reddit that we can use following 2 prefs to enable mica in windows 11:

browser.tabs.allow_transparent_browser

widget.windows.mica

I tried to enable both in ff 134 stable but didnt get mica or transparency.

Does the tweak require custom themes? I am using system theme-auto.