# Close Tab Button Quantum

> Toolbar button to close the current tab. Works on the newest version of Firefox. This is a replacement for browser.tabs.closeButtons feature set to '3' of old firefox.

Canonical page: [https://chrome-stats.com/d/close-tab-button-quantum](https://chrome-stats.com/d/close-tab-button-quantum)

## Overview

- **ID:** `close-tab-button-quantum`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Firefox user 13510456
- **Category:** appearance,tabs
- **Daily users:** 516
- **Weekly downloads:** 8
- **Rating:** 3.80 / 5 (25 ratings)
- **Version:** 1.0.1resigned1
- **Last updated:** 2024-04-25
- **First published:** 2017-11-22
- **Size:** 10 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/close-tab-button-quantum/)

## Description

Close Tab Button Quantum is a simple yet powerful Firefox extension that adds a dedicated toolbar button for closing the current tab instantly. Designed to work seamlessly with the newest Firefox versions, it replaces the deprecated browser.tabs.closeButtons feature set to '3' from older versions.

With this extension, users regain quick tab management functionality without relying on complex menus or multiple clicks. It's ideal for users who want a straightforward, accessible way to close active tabs directly from the toolbar, enhancing browsing efficiency and convenience.

## Rankings

- #4,869 — Overall
- #38 — close
- #149 — tons
- #197 — button for google
- #238 — tabellenkalkulation

## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- This permission has no access or impact on the user's system or data, thus carrying no risk.
- 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).

## Review summary

Users appreciate the add-on for restoring the close tab button functionality lost in Firefox Quantum, valuing its simplicity and reliability. However, multiple reviews highlight the lack of customization options, particularly inability to change the color or size of the close button, and imperfect replication of original Firefox behavior by showing close buttons on all tabs plus the title bar. Compatibility issues with CSS features and missing functionalities like middle-click reopening of closed tabs are also noted. Overall, it fulfills an important need but could be improved with more customization and better integration.

### Pros

- Effectively restores the close tab button functionality missing in newer Firefox versions.
- Simple and reliable, works as advertised even with newer Firefox versions like v109.0.
- Appreciated by users who use custom Firefox styles or miss the Tab Mix Plus extension.
- Adds a close button to the title bar and removes close buttons from tabs as intended.
- User-friendly and fills a specific functionality gap post-Firefox Quantum update.

### Cons

- Lack of customization options like changing the color of the close (X) button, which affects visibility especially in dark mode.
- Does not perfectly replicate original behavior; users want the close button only on active tabs or only on the title bar, but the add-on shows buttons on all tabs plus the title bar.
- Compatibility issues with certain Firefox CSS options like 'Hide lone tab' where close button behavior is inconsistent.
- No option to scale or resize the close button, some users request smaller or adjustable button sizes.
- No middle-click action to reopen last closed tab, which some users miss.

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Source: [Chrome-Stats](https://chrome-stats.com/d/close-tab-button-quantum)