Transparent menu-bar menus on custom themes

[hdk5]

Describe the bug
Menu-bar menus are too hard to see on themes other than default ones.

Expected behavior
Menus are not transparent and have solid white background.

Screenshots
Light - OK:

Firefox Alpenglow - too transparent:

Dream of Waves - even more transparent

Environment (please complete the following information):
Check like - [x].

• Distribution
  • Original Lepton
  • Lepton's photon style
  • Lepton's proton style
• Firefox Version: 91.0
• OS:
  • Linux
  • Windows
  • Mac
  • Others:
• Theme:
  • Light
  • Dark
  • Alpenglow(System: Light)
  • Alpenglow(System: Dark)
  • System Default
    • GTK Theme Name(Only Linux User): [sample] Adwaita, Adwaita-Dark, Breath, Breath-Dark

Additional context
Add any other context about the problem here.

[hdk5]

Also, an address bar has a similar issue

[black7375]

Perhaps it has been fixed now.

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https://www.reddit.com/r/FirefoxCSS/comments/p2ee0v/lepton_30_released/h8mpe0p/?context=3

I deleted line 271 in userChrome.css and now it's perfect! Thank you, much appreciated!

If there is a problem later, we should consider erasing 271 Line

Firefox-UI-Fix/userChrome.css

Line 271 in 14983e6

--menu-background-color: var(--toolbar-bgcolor, var(--in-content-button-background)) !important;