What does Tab Focus do?

Tab Focus focuses on preventing websites from detecting when users leave or switch away from a browser tab. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is Tab Focus for?

Tab Focus is a consumer product built for firefox users who need per-tab privacy controls.

Does Tab Focus have a free plan?

Yes — Tab Focus is free to use.

What platforms does Tab Focus run on?

Tab Focus runs on the web and embeddable surfaces.

Is Tab Focus still maintained?

Unverified. Tab Focus has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to Tab Focus?

Similar projects tracked by PulseGate include Focus On Left Tab After Closing, Video Focus Lock, and Tab Lock.

Tab Focus is developed by LKNQ.

How long has Tab Focus been around?

Tab Focus first shipped in 2026.

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Tab Focus

Name: Tab Focus
Author: LKNQ

mozilla.orgBrowser DevTools & extensions

Tab Focus is a Firefox browser extension that prevents websites from detecting when users switch away from selected tabs. It supports multiple spoofing modes, per-tab controls, hotkeys, auto-disable timers, site rules, tab groups, and usage statistics.

FreeWebEmbeddable

Visit mozilla.org

Overview

9 features

Tab Focus is a Browser DevTools & extensions project. It focuses on preventing websites from detecting when users leave or switch away from a browser tab. Tab Focus is a consumer product aimed at firefox users who need per-tab privacy controls. It is available for free. It ships for the web and embeddable surfaces.

Behind Tab Focus is LKNQ, and it first shipped in 2026. Key capabilities include per-tab protection, hotkey controls, and spoofing modes. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Per-tab protection
Hotkey controls
Spoofing modes
Auto-disable timers
Site auto-rules
Tab groups
Wildcard matching
Import and export
Usage statistics

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed12 Sep · 01:09 UTC
Tab Focus verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Tab Focus

What does Tab Focus do?: Tab Focus focuses on preventing websites from detecting when users leave or switch away from a browser tab. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Tab Focus for?: Tab Focus is a consumer product built for firefox users who need per-tab privacy controls.
Does Tab Focus have a free plan?: Yes — Tab Focus is free to use.
What platforms does Tab Focus run on?: Tab Focus runs on the web and embeddable surfaces.
Is Tab Focus still maintained?: Unverified. Tab Focus has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to Tab Focus?: Similar projects tracked by PulseGate include Focus On Left Tab After Closing, Video Focus Lock, and Tab Lock.Focus On Left Tab After Closing Video Focus Lock Tab Lock
Who makes Tab Focus?: Tab Focus is developed by LKNQ.
How long has Tab Focus been around?: Tab Focus first shipped in 2026.

At a glance

Pricing: Free
Platforms: Web
First seen: 12 Sept 2026
Built for: Firefox users who need per-tab privacy controls
Model: B2C
Solves: Preventing websites from detecting when users leave or switch away from a browser tab.

Registered as

Firefox Add-ons: focusontab

Developer

LKNQ

Index record

Indexed: 12 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 12 Sep 2026

Identity audit (13)

Slug: tab-focus-mozilla-org
Lifecycle state recorded: 12 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 12 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 12 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/focusontab

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