- Firefox 110
- Windows
- MacOS
- Linux
-
Download the
chromefolder and put it in your user profile folder. For convenience, useabout:profiles -
Go to
about:configand activate the keys belowtoolkit.legacyUserProfileCustomizations.stylesheetslayout.css.color-mix.enabledlayout.css.has-selector.enabled(Firefox 113+ && v1.5.113 Beta)svg.context-properties.content.enabled(Activate this key if the menu icons / tab corners do not follow the general design color. Previously seen only on MacOS)
-
Specify the desired shape of the tabs.
userChrome.ProtonTabs-Enabled
userChrome.PhotonTabs-Enabled
userChrome.WaveFoxTabs-Enabled
userChrome.ChromeTabs-Enabled
userChrome.EdgeTabs-Enabled
userChrome.AustralisTabs-Enabled
userChrome.LegacyChromeTabs-Enabled
Works with modern versions of Windows 11 / Windows 10. System effects must be supported on the operating system side. Otherwise, you need third-party software, such as Mica For Everyone. You also need to disable the accent color in the operating system settings, if it was enabled. Works only with the system theme.

Download and install Mica For Everyone from here.
userChrome.Windows.SystemEffects.Enabled
Works only with the system theme.

userChrome.Toolbar.Transparency.Low.EnableduserChrome.Toolbar.Transparency.Medium.EnableduserChrome.Toolbar.Transparency.High.EnableduserChrome.Toolbar.Transparency.VeryHigh.Enabled(Proton Tabs Only)
Requires Linux with transparency support. Tested on Linux Manjaro KDE + ForceBlur. Transparency is active for all modes, but does not work everywhere. This may change with future browser updates. Works only with the system theme.
userChrome.Linux.Transparency.Enabledgfx.webrender.all(Required key)
The tab frame consists of type, color and saturation. Not compatible with themes that use a translucent toolbar.

userChrome.LightTheme.TabFrameType.Border.EnableduserChrome.LightTheme.TabFrameType.Shadow.Enabled
userChrome.LightTheme.TabFrameColor.Auto.EnableduserChrome.LightTheme.TabFrameColor.White.EnableduserChrome.LightTheme.TabFrameColor.Black.Enabled
userChrome.LightTheme.TabFrameSaturation.Low.EnableduserChrome.LightTheme.TabFrameSaturation.Medium.EnableduserChrome.LightTheme.TabFrameSaturation.High.EnableduserChrome.LightTheme.TabFrameSaturation.VeryHigh.Enabled
userChrome.DarkTheme.TabFrameType.Border.EnableduserChrome.DarkTheme.TabFrameType.Shadow.Enabled
userChrome.DarkTheme.TabFrameColor.Auto.EnableduserChrome.DarkTheme.TabFrameColor.White.EnableduserChrome.DarkTheme.TabFrameColor.Black.Enabled
userChrome.DarkTheme.TabFrameSaturation.Low.EnableduserChrome.DarkTheme.TabFrameSaturation.Medium.EnableduserChrome.DarkTheme.TabFrameSaturation.High.EnableduserChrome.DarkTheme.TabFrameSaturation.VeryHigh.Enabled
userChrome.TabSeparatorsLowSaturation-EnableduserChrome.TabSeparatorsMediumSaturation-Enabled
By default context menus follow the selected interface density, but it is possible to set a fixed size.
| Compact | Normal | Touch |
|---|---|---|
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userChrome.CompactContextMenu-EnableduserChrome.NormalContextMenu-EnableduserChrome.TouchContextMenu-Enabled
| Regular | Filled |
|---|---|
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userChrome.RegularMenuIcons-EnableduserChrome.FilledMenuIcons-Enabled
userChrome.DragSpace.Left.DisableduserChrome.DragSpace.Right.DisableduserChrome.DragSpace.Top.Windowed.EnableduserChrome.DragSpace.Top.Maximized.EnableduserChrome.DragSpace.Top.Fullscreen.Enabled
userChrome.PinnedTabsWidthLowIncrease-EnableduserChrome.PinnedTabsWidthHighIncrease-Enabled
userChrome.OneLine.TabBarFirst.EnableduserChrome.OneLine.NavBarFirst.Enabledbrowser.tabs.inTitlebar(Enable this key if there are problems with window control buttons. Set the value to 0)
Low values are more suitable for high resolution monitors.
userChrome.OneLine.NavBarWidth.Low.EnableduserChrome.OneLine.NavBarWidth.Medium.EnableduserChrome.OneLine.NavBarWidth.High.Enabled
userChrome.TabsOnBottom-Enabledbrowser.tabs.inTitlebar(Required key. Set the value to 0)










