# Tab Focus

> Prevent selected tabs from detecting when you switch away.

Canonical page: [https://chrome-stats.com/d/focusontab](https://chrome-stats.com/d/focusontab)

## Overview

- **ID:** `focusontab`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** LKNQ
- **Category:** privacy-security,tabs
- **Daily users:** 95
- **Weekly downloads:** 27
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 4.1
- **Last updated:** 2026-03-25
- **First published:** 2026-03-21
- **Size:** 26 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/focusontab/)

## Description

Tab Focus is a browser extension that prevents websites from knowing when you switch away from their tab. When enabled on a tab, it intercepts all tab-switch detection methods used by pages: the Page Visibility API, visibilitychange events, blur and focus events, pagehide, and animation frame throttling. The page always sees itself as visible and focused, no matter what you are actually doing.
You can enable protection per tab with a single click or hotkey, choose between three spoofing modes (full, visibility only, or focus only), and set auto-disable timers. Auto-rules let you protect specific sites automatically every time they load, and tab groups let you enable protection across a set of sites at once. A clean popup gives you a live view of all open tabs, rule management with wildcard pattern matching, import and export, and a stats panel tracking usage over time.

## Rankings

- #12,051 — Overall
- #10 — focus
- #127 — prevent
- #244 — tab
- #249 — visibility

## Permissions and access

### Permissions

- `tabs`
- `storage`
- `activeTab`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High 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).

## Similar extensions and apps

- [GhostTab Pro: Ultimate Stealth](https://chrome-stats.com/d/ghosttab-pro) — 6 users
- [Focusly: Active & Focused Tabs](https://chrome-stats.com/d/focusly-active-focused-tabs) — 69 users
- [No Focus Spying](https://chrome-stats.com/d/no-focus-spying) — 11 users, 4.50 / 5
- [Focus Guard](https://chrome-stats.com/d/focus-guard) — 1 users
- [Stay Focused - Disable Visibility API](https://chrome-stats.com/d/stay-focused-addon) — 38 users
- [Focus Mode Toggle](https://chrome-stats.com/d/focus-mode-toggle21) — 2 users
- [Tab Prison — Focus Tab Locker](https://chrome-stats.com/d/tab-prison-focus-tab-locker) — 4 users
- [One Tab Focus](https://chrome-stats.com/d/one-tab-focus) — 12 users, 4.00 / 5
- [Tab Focus Sync](https://chrome-stats.com/d/tab-focus-sync)
- [FocusGuard Pro](https://chrome-stats.com/d/focusguard-by-jtd) — 4 users
- [Focus Mode for Tabs](https://chrome-stats.com/d/focus-mode-for-tabs)
- [Tab Reuser](https://chrome-stats.com/d/tab-reuser) — 6 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/focusontab)