How to make the about:blank page black or any other color in Firefox?

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Track title: CC D Schuberts Piano Sonata D 850 in D

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Chapters
00:00 Question
00:25 Accepted answer (Score 65)
01:05 Answer 2 (Score 37)
03:27 Answer 3 (Score 15)
04:39 Answer 4 (Score 8)
05:19 Thank you

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Full question
https://superuser.com/questions/603218/h...

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Tags
#firefox

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