# Switch to already opened tab

> 新規タブ画面から何かのWebサイトを開いた時に、同じウィンドウ内に同一のURLを持つタブがあった場合は(そのURLを開く代わりに)そのタブをアクティブにします。 例えば、twitter.comを既に開いている状態で、新しくタブを開いてtwitter.comを開こうとした場合、このアドオンは新しく開いたタブを閉じ、既存のtwitter.comのタブにフォーカスします。

Canonical page: [https://chrome-stats.com/d/switch-to-already-opened-tab](https://chrome-stats.com/d/switch-to-already-opened-tab)

## Overview

- **ID:** `switch-to-already-opened-tab`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** rinsuki
- **Category:** tabs
- **Daily users:** 7
- **Rating:** 1.00 / 5 (1 ratings)
- **Version:** 1.0.0
- **Last updated:** 2019-12-18
- **First published:** 2019-12-18
- **Size:** 8.04 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/switch-to-already-opened-tab/)
- **Website:** [https://github.com/rinsuki/switch-to-already-opened-tab](https://github.com/rinsuki/switch-to-already-opened-tab)

## Description

Switch to Already Opened Tab is a Firefox add-on that automatically focuses on existing tabs with the same URL instead of opening duplicate tabs. It enhances browsing efficiency by avoiding unnecessary duplication and clutter in the browser window.

## Rankings

- #38,660 — Overall

## Permissions and access

### Permissions

- `webNavigation`
- `tabs`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate 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/switch-to-already-opened-tab)