- Move the theme files into
[your-profile]/chrome/. - Configure
about:configwith these preferences:
| Preference | Value | Platform / Notes |
|---|---|---|
toolkit.legacyUserProfileCustomizations.stylesheets |
true | Required |
svg.context-properties.content.enabled |
true | Required |
browser.newtabpage.activity-stream.nova.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.
Important
For East Asian (CJK) input: Must enable "Address Bar: show results during IME composition" in Settings > Firefox Labs.
- Restart Firefox to apply changes.
Create these preferences in about:config to modify the UI:
| Preference | Description | Notes |
|---|---|---|
gwfox.toolbar |
Auto hide bookmarks toolbar | |
gwfox.urlbar |
Move address bar to sidebar | Sidebar expanded (not hover to expand) |
gwfox.blur |
Add acrylic effect to the floating panel | |
gwfox.ac |
Enable accent color | Edit --bg0 in CSS to customize |
gwfox.atbc |
Adaptive Tab Bar Colour compatibility | |
gwfox.newtab |
Enable New Tab transparency | Requires allow_transparent_browser |
gwfox.noborder |
Remove window borders | |
gwfox.bms |
Enable main window transparency | Linux only |
gwfox.icons |
Add menu icons |
| Preference | Description | Values |
|---|---|---|
gwfox.sidebar |
Set sidebar width | 1, 2, or 3 |