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Transparent Option Menu and Drop Down Menu Background

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Hi, I'm using Firefox and Nightly both updated to latest versions on Feren OS (Linux). The drop downs, option menus, bookmarks etc. all have transparent background on Nightly. Stable version has black background and white text as it should be.

I've tried userChrome.css but it doesn't work. Changing font-sizes do work which proves that Nightly looks for this file at startup. I've tried changing background on these CSS elements:

  1. main-menubar menupopup
  2. PlacesToolbarItems menupopup > hbox

My OS details are: Operating System: Feren OS 2021.04 KDE Plasma Version: 5.21.5 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.2 Kernel Version: 5.8.0-55-generic OS Type: 64-bit

Image is attacked for reference.

Hi, I'm using Firefox and Nightly both updated to latest versions on Feren OS (Linux). The drop downs, option menus, bookmarks etc. all have transparent background on Nightly. Stable version has black background and white text as it should be. I've tried userChrome.css but it doesn't work. Changing font-sizes do work which proves that Nightly looks for this file at startup. I've tried changing background on these CSS elements: #main-menubar menupopup #PlacesToolbarItems menupopup > hbox My OS details are: Operating System: Feren OS 2021.04 KDE Plasma Version: 5.21.5 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.2 Kernel Version: 5.8.0-55-generic OS Type: 64-bit Image is attacked for reference.
Attached screenshots

All Replies (2)

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Can you go to about:support on both versions and compare the Composing in the Graphics section?

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TyDraniu said

Can you go to about:support on both versions and compare the Composing in the Graphics section?

Both are WebRender.

I forgot to mention that issue remained after multiple updates as well hence it's not the case that current update did this.