- Move the theme files into
[your-profile]/chrome/.
- Configure
about:config with these preferences:
| Preference |
Value |
Platform / Notes |
toolkit.legacyUserProfileCustomizations.stylesheets |
true |
Required |
svg.context-properties.content.enabled |
true |
Required |
sidebar.animation.enabled |
false |
Required |
widget.windows.mica |
true |
Windows¹ |
widget.windows.mica.toplevel-backdrop |
2 |
Windows |
widget.gtk.rounded-bottom-corners.enabled |
true |
Linux |
widget.macos.native-context-menus |
false |
macOS |
¹ Windows: Requires enabling "System theme — auto" in Firefox Add-ons manager.
- Restart Firefox to apply changes.
Create these preferences in about:config to modify the UI:
| Preference |
Description |
Notes |
gwfox.plus |
Enable bundled layout |
macOS UI + Compact mode |
gwfox.plus_sc |
Use native window controls |
Sub-option for gwfox.plus |
gwfox.icons |
Enable menu icons |
Add icons to menu items |
gwfox.bms |
Enable transparency |
Linux only |
gwfox.noborder |
Remove window borders |
Borderless window mode |
gwfox.atbc |
Enable ATBC compatibility |
For Adaptive Tab Bar Colour |
gwfox.blur |
Enable UI blur effects |
Disable if performance issues occur |
gwfox.ac |
Enable accent color |
Edit --bg0 in CSS to customize |
gwfox.tp |
Enable New Tab transparency |
Requires allow_transparent_browser |
gwfox.db |
Disable menu blur |
Turn off blur on panels/menus |
| Preference |
Description |
Values |
gwfox.sidebar |
Set sidebar width |
1, 2, or 3 |