# Theme Customizer - for Firefox

> Create custom themes in seconds. Use live preview, smart color pickers, and a randomizer to design your perfect browser look.

Canonical page: [https://chrome-stats.com/d/theme-customizer-for-firefox](https://chrome-stats.com/d/theme-customizer-for-firefox)

## Overview

- **ID:** `theme-customizer-for-firefox`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** HaSa-Tools
- **Category:** appearance,tabs
- **Daily users:** 2
- **Weekly downloads:** 11
- **Version:** 1.0.0
- **Last updated:** 2026-06-22
- **First published:** 2026-06-19
- **Size:** 46 KB
- **Data as of:** 2026-09-05
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/theme-customizer-for-firefox/)
- **Website:** [https://neues-billiger.de/](https://neues-billiger.de/)

## Description

Take full control over your browser's look with Theme Customizer - for Firefox!
Whether you prefer a sleek dark mode, a vibrant colorful setup, or a clean minimalist design, this extension lets you mix and match colors for your browser interface in just a few clicks. No design skills or coding required—just pick your colors and enjoy a personalized browsing experience.

Key Features:
•  ✨ Full Interface Customization: Instantly change the colors of your browser frame (top bar), toolbars, tabs, and active window areas.
•  🎨 Smart Color Pickers: Use intuitive color wheels to find your favorite shades or enter exact RGB values for maximum precision.
•  ⚡ Quick Contrast Buttons: Swap text colors between pure white and solid black instantly to ensure perfect readability.
•  ↩️ Design History (Undo): Made a mistake? Quickly reload your previous design with the "Load Last Design" feature.
•  🗑️ Safe One-Click Reset: Want a fresh start? Instantly restore the original Firefox default theme anytime.
•  💾 Persistent Storage: Your custom creations are saved automatically and reload instantly whenever you restart Firefox.

How to use:
1.  Click the Theme Customizer icon in your toolbar.
2.  Select your desired colors for the Frame, Toolbar, and Text.
3.  Click Apply Design to see the changes instantly.
Note: This extension respects your privacy. All your themes and preferences are stored locally on your device and are never shared or sent to any servers.

## Rankings

- #65,860 — Overall
- #114 — customize

## Permissions and access

### Permissions

- `theme`
- `storage`
- `tabs`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/theme-customizer-for-firefox)