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작성: Vojtano, 날짜: 8월 2, 2016 ·

Don't trust that other comment. It works this way, but you must have an AMOLED screen. I do have it and this is exactly what makes my firefox more efficient.
It's a must for all AMOLED screen users ;-)

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작성: JamesMP80, 날짜: 10월 30, 2012 ·

the color of the screen does not affect the amount of power used the back lighting is what consumes power and even on a screen showing all black the backlight is still on