# black7375/firefox-ui-fix

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5,841 stars · 198 forks · SCSS · MPL-2.0

## Links

- GitHub: https://github.com/black7375/Firefox-UI-Fix
- awesome-repositories: https://awesome-repositories.com/repository/black7375-firefox-ui-fix.md

## Topics

`firefox` `firefox-css` `firefox-customization` `firefox-theme` `firefox-tweaks` `hacktoberfest` `theme` `unixporn` `user-interface` `userchrome` `userchrome-styles` `userchromecss` `userstyles`

## Description

Firefox-UI-Fix is a collection of CSS stylesheets, style overrides, and a UserChrome framework designed to redefine the layout and appearance of the Firefox web browser. It functions as a browser interface customizer and styling kit that uses CSS injection and DOM overrides to modify the browser shell.

The project distinguishes itself by providing deep integration with host operating systems, allowing the browser's window decorations, menus, and themes to match system accent colors and native desktop aesthetics. It includes specialized capabilities for modifying the visual hierarchy of the interface and providing predefined visual theme distributions.

Broad capability areas cover comprehensive layout modification, including the ability to adjust element density, reposition tab bars, and reorganize navigation toolbars. The project also provides tools for tab management, the redesign of internal media players, the removal of interface animations, and the customization of internal browser pages and typography.

The system is implemented using SCSS and leverages the browser's internal styling mechanisms and preference-driven configurations.

## Tags

### Development Tools & Productivity

- [UserChrome CSS Injections](https://awesome-repositories.com/f/development-tools-productivity/firefox-configuration/userchrome-css-injections.md) — Provides a collection of CSS stylesheets for modifying the visual layout and appearance of the browser.
- [UI Panel Styling](https://awesome-repositories.com/f/development-tools-productivity/window-managers/split-screen-layouts/panel-styling-configurations/ui-panel-styling.md) — Adjusts panel padding, rounding, and separators to achieve a square aesthetic for menus. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Tips))

### Operating Systems & Systems Programming

- [Desktop Environment Integrations](https://awesome-repositories.com/f/operating-systems-systems-programming/desktop-environment-frameworks/desktop-environment-components/desktop-environments-ui/desktop-environment-integrations.md) — Adjusts tab and title bar drawing settings for correct integration with the host desktop environment. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Tips))

### Software Engineering & Architecture

- [Browser UI Layout Overrides](https://awesome-repositories.com/f/software-engineering-architecture/block-based-data-models/dynamic-block-mutations/dom-mutation-rendering/imperative-dom-mutations/runtime-dom-and-cssom-overrides/browser-ui-layout-overrides.md) — Restructures the visual hierarchy of toolbars and panels by redefining the positioning of HTML elements.

### User Interface & Experience

- [Browser Interface Customizations](https://awesome-repositories.com/f/user-interface-experience/browser-interface-customizations.md) — Changes the visual layout, spacing, and behavior of the Firefox user interface using CSS and configuration.
- [Browser Interface Customizations](https://awesome-repositories.com/f/user-interface-experience/browser-interface-customizers/browser-interface-customizations.md) — Provides style overrides for adjusting tab shapes, toolbar density and navigation bar behavior.
- [Browser Interface Overrides](https://awesome-repositories.com/f/user-interface-experience/browser-interface-overrides.md) — Leverages the browser's internal styling mechanism to apply deep visual changes to the chrome and interface shell.
- [Browser Theme Development](https://awesome-repositories.com/f/user-interface-experience/browser-theme-development.md) — Creates custom color schemes and visual styles for Firefox to match system accents or design languages.
- [Color Schemes](https://awesome-repositories.com/f/user-interface-experience/color-schemes.md) — Modifies interface colors to support various light, dark, and system-level color schemes. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Screenshots))
- [Interface Layout Customization](https://awesome-repositories.com/f/user-interface-experience/interface-layout-customization.md) — Allows extensive modification of the browser's visual structure and layout behavior using CSS. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Tutorial))
- [System Appearance Matching](https://awesome-repositories.com/f/user-interface-experience/system-appearance-matching.md) — Modifies the theme to match the look and feel of the host operating system. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))
- [Custom Stylesheet Injections](https://awesome-repositories.com/f/user-interface-experience/third-party-client-styling/internal-css-overrides/custom-stylesheet-injections.md) — Injects custom stylesheets to override default browser layout and styling rules.
- [Accent Color Management](https://awesome-repositories.com/f/user-interface-experience/ui-architecture/design-utilities/design-systems/color-system-utilities/accent-color-management.md) — Themes the interface and foreground text using system-level accent color variables. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Tips))
- [Browser Preference Injectors](https://awesome-repositories.com/f/user-interface-experience/user-preference-settings/browser-preference-injectors.md) — Alters browser behavior and feature visibility by modifying internal preference values and flags.
- [Visual Themes](https://awesome-repositories.com/f/user-interface-experience/visual-theme-configurations/visual-themes.md) — Allows switching between predefined style distributions to change the overall look and feel of the user interface. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Tutorial))
- [Toolbar Reorganization](https://awesome-repositories.com/f/user-interface-experience/action-toolbars/toolbar-button-customizations/toolbar-reorganization.md) — Combines URL bars with navigation buttons and modifies the placement of search widgets. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Show-Off-Your-Config))
- [Browser Workflow Optimizations](https://awesome-repositories.com/f/user-interface-experience/browser-workflow-optimizations.md) — Modifies the navigation bar, tab behavior, and toolbar visibility to increase screen real estate and productivity.
- [Component Corner Rounding](https://awesome-repositories.com/f/user-interface-experience/button-styles/round/rounded-corner-shapes/component-corner-rounding.md) — Removes rounded corners from tabs, buttons, panels, and input fields for a square aesthetic. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))
- [Window Control Button Style Selectors](https://awesome-repositories.com/f/user-interface-experience/button-styles/window-control-button-style-selectors.md) — Modifies the appearance of window control buttons on Linux to match non-native styles. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Compatibility-Issues-Solution))
- [CSS Variable Theming](https://awesome-repositories.com/f/user-interface-experience/css-variable-theming.md) — Links interface colors to system-level accent variables using CSS custom properties.
- [Dark Mode Toggles](https://awesome-repositories.com/f/user-interface-experience/dark-mode-toggles.md) — Provides mechanisms to toggle between predefined light and dark visual themes for the browser interface.
- [Desktop Component Styling](https://awesome-repositories.com/f/user-interface-experience/desktop-component-styling.md) — Matches browser window decorations and menus with the look and feel of the host operating system.
- [Tab Layout Customizations](https://awesome-repositories.com/f/user-interface-experience/desktop-environment-customizers/desktop-interface-customization/tab-layout-customizations.md) — Customizes tab visuals, including close button visibility and sound indicators. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))
- [Interface Element Hiding](https://awesome-repositories.com/f/user-interface-experience/interface-element-hiding.md) — Hides the tab bar, navigation bar, bookmark bar, and sidebar automatically until interaction. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))
- [Layout Density Utilities](https://awesome-repositories.com/f/user-interface-experience/layout-density-utilities.md) — Provides utilities to adjust interface element spacing and sizing for compact or touch-friendly modes. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Screenshots))
- [Media Player Interfaces](https://awesome-repositories.com/f/user-interface-experience/media-player-interfaces.md) — Redesigns the default video and audio player with a modern layout and smooth animations. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))
- [Padding Reduction](https://awesome-repositories.com/f/user-interface-experience/menus-and-toolbars/padding-reduction.md) — Reduces the height and width of toolbars and panels to maximize screen real estate. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))
- [UI Element Visibility Toggles](https://awesome-repositories.com/f/user-interface-experience/page-headers/page-action-integrations/page-element-injections/ui-element-visibility-toggles.md) — Hides specific interface elements from view, such as tab icons or navigation bars. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))
- [Tab Bar Repositioning](https://awesome-repositories.com/f/user-interface-experience/tab-bar-customizers/tab-bar-repositioning.md) — Moves the tab bar to the bottom of the window or integrates it into the title bar. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))
- [Tab Shape Customizers](https://awesome-repositories.com/f/user-interface-experience/tab-bar-customizers/tab-shape-customizers.md) — Modifies tab shapes, padding, and height to emulate specific design languages. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Tips))
- [UI Utility Kits](https://awesome-repositories.com/f/user-interface-experience/ui-utility-kits.md) — Provides a resource for applying system accent colors and custom themes to the browser interface.
- [Web Browser UX Design](https://awesome-repositories.com/f/user-interface-experience/web-browser-ux-design.md) — Adjusts element density, removes animations, and redesigns internal panels to improve the overall user experience.
- [Multi-row Wrapping](https://awesome-repositories.com/f/user-interface-experience/widget-arrangement-systems/row-and-column-layouts/multi-row-wrapping.md) — Enables tabs and bookmark bars to wrap across multiple rows to improve visibility. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Show-Off-Your-Config))
- [Unified Row Layouts](https://awesome-repositories.com/f/user-interface-experience/widget-arrangement-systems/row-and-column-layouts/unified-row-layouts.md) — Combines the tab bar and navigation bar into a single row to save vertical screen space. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Options))

### Part of an Awesome List

- [Native Menu Emulation](https://awesome-repositories.com/f/awesome-lists/devtools/ui-styling-and-themes/native-os-themes/native-menu-emulation.md) — Restores the native operating system style for context and application menus. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Tips))
- [Vertical Tab Layouts](https://awesome-repositories.com/f/awesome-lists/productivity/tab-management/vertical-tab-layouts.md) — Hides the top tab bar and optimizes the sidebar layout for vertical tab extensions. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Show-Off-Your-Config))

### Web Development

- [UI Component Toggles](https://awesome-repositories.com/f/web-development/browser-automation/stealth-configurations/feature-toggles/ui-component-toggles.md) — Activates or deactivates specific UI components and layout behaviors via preference values. ([source](https://github.com/black7375/Firefox-UI-Fix/wiki/Tutorial))