Installation

1. Create a chrome folder in your Firefox profile directory and move the theme files into it.
2. In about:config configure the following preferences:
   • Set to true:
     • toolkit.legacyUserProfileCustomizations.stylesheets
     • svg.context-properties.content.enabled
     • widget.windows.mica (Windows; requires System theme — auto to work)
   • Set to false:
     • sidebar.animation.enabled
     • widget.macos.native-context-menus (macOS)
   • Set to 2:
     • widget.windows.mica.toplevel-backdrop (Windows)
3. Restart Firefox.

Customization

Create these preferences in about:config to customize:

• Boolean:

  • gwfox.plus: Bundled layout (macOS UI + compact mode).
    • gwfox.plus_sc: Use native window controls.
  • gwfox.atbc: Enable compatibility with the Adaptive Tab Bar Colour extension.
  • gwfox.noborder: Remove window borders.
  • gwfox.icons: Enable menu icons.
  • gwfox.ac: Enable accent color (Edit --bg0 in .css files to customize).

• Number:

  • gwfox.sidebar: Set to 1, 2, or 3 for sidebar width.