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System Theme Looks Like Light Theme on macOs Big Sur Version 11.4

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I upgraded macOS to 11.4 recently and the firefox system theme looks like the light theme right now. Does anyone know how to fix this? Thanks!

I upgraded macOS to 11.4 recently and the firefox system theme looks like the light theme right now. Does anyone know how to fix this? Thanks!

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Can anyone help me with this? Thanks!