Welcome to the ultimate guide on how to install and customize the Firefox UWP Style theme! This theme incorporates Universal Windows Platform (UWP) styling, giving your browser a sleek and modern appearance. Follow the steps below to transform your Firefox experience seamlessly.

Installation Steps

To get started, you need to select the appropriate file according to your Firefox version:

• Firefox Nightly
• Firefox 128-129
• Firefox 120-127

Once you have downloaded the correct file, follow these steps:

1. Extract the content of the downloaded file.
2. Navigate to your Firefox user profile folder and locate the chrome folder.
3. Copy the extracted contents into your chrome folder.
4. Open Firefox and type about:config in the address bar.
5. Search for toolkit.legacyUserProfileCustomizations.stylesheets, toggle it to true, and then restart Firefox.

Understanding the Styles

The Firefox UWP Style theme comes with various styling options that enhance your browsing experience.

MDL2

This style implements the original UWP design from 2015, adhering to the Material Design Language (MDL2). By default, it emphasizes accent colors along with gray-on-black and gray-on-white elements.

Sun Valley

Inspired by the fluent design refresh from 2021, Sun Valley style utilizes rounded corners and smooth colors. To enable this, you’ll need to create some boolean preferences:

• uwp.sun-valley – Enables Sun Valley style.
• uwp.sun-valley.font – Enables Segoe UI Variable font.
• uwp.sun-valley.round-tabs – Enables rounded tabs.
• uwp.sun-valley.colored-tabs – Enables color customization for tabs.

Customization Options

Customizing the Firefox UWP Style theme is easy, giving you control over how your browser looks:

• Toggle layout.css.backdrop-filter.enabled to enable acrylic blur in certain menus.
• Toggle widget.non-native-theme.use-theme-accent to allow the accent color on all about: pages.

Mica (WIP)

This feature, which requires MicaForEveryone, is not supported after Firefox 116. This allows a stunning aesthetic that enhances the Sun Valley style. Set it up by creating a process rule for Firefox within MicaForEveryone.

Changing the Accent Color

To customize the accent color for Firefox:

• For Firefox 102 and older versions, use:

ui.-moz-accent-color=#FF00FF

ui.-moz-accent-color-foreground=#FFFFFF

• For Firefox 103 and newer versions:

ui.accentcolor=#FF00FF

ui.accentcolortext=#FFFFFF

Troubleshooting

If you encounter issues while installing or using the theme, here are a few troubleshooting steps:

• Ensure that you have copied the correct files into the chrome folder.
• Confirm that the toolkit.legacyUserProfileCustomizations.stylesheets preference is set to true.
• Restart Firefox after making any changes to the configuration settings.
• If problems persist, check the documentation on the GitHub repository for further guidance.
• For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

Conclusion

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.