# Left Tab Focus on Close

> Activates the tab to the left when the current Firefox tab is closed.

Canonical page: [https://chrome-stats.com/d/left-tab-focus-on-close](https://chrome-stats.com/d/left-tab-focus-on-close)

## Overview

- **ID:** `left-tab-focus-on-close`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Mark Mark
- **Category:** tabs
- **Daily users:** 1
- **Version:** 1.1.1
- **Last updated:** 2026-06-15
- **First published:** 2026-05-22
- **Size:** 67 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/left-tab-focus-on-close/)

## Description

Left Tab Focus on Close changes Firefox's tab-closing behavior. When you close the active tab, the extension activates the tab immediately to the left. If the closed tab was the first tab in the window, it activates the next available tab on the right instead.

The extension works independently in each Firefox window, handles pinned tabs by their normal tab-strip position, and uses only official Firefox WebExtension APIs. It does not collect or transmit user data

## Rankings

- #108,268 — Overall
- #228 — close

## Permissions and access

### Permissions

- `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/left-tab-focus-on-close)