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New Firefox Release makes my themes look faded/glazed over

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So the new release of firefox makes the themes I use , which are dark r black in colour appear to be glazed over in a grey translucent overlay and I am wondering how to make it so that my themes are visible. Even if I just have to use a solid colour black theme, it still does this. I've tried countless themes and they all do the same things. Is there an add on that helps you customize it more?

So the new release of firefox makes the themes I use , which are dark r black in colour appear to be glazed over in a grey translucent overlay and I am wondering how to make it so that my themes are visible. Even if I just have to use a solid colour black theme, it still does this. I've tried countless themes and they all do the same things. Is there an add on that helps you customize it more?
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You can use a custom style rule in a userChrome.css file to modify the background on those toolbars and on the selected tab. Could you check what I posted in the following thread and see whether it might work for you: https://support.mozilla.org/questions/1184819#answer-1028842