What is New Window Block?

New Window Block focuses on preventing unwanted tabs and windows from opening on blocked websites. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is New Window Block for?

New Window Block is a consumer product built for firefox users who want to control unwanted pop-ups and new windows.

Is New Window Block free?

Yes — New Window Block is free to use.

What platforms does New Window Block run on?

New Window Block runs on the web and embeddable surfaces.

Is New Window Block still active?

Unverified. New Window Block 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 New Window Block?

Similar projects tracked by PulseGate include Private Window Blocker, Private Window Blocker, and WebBlock.

Who makes New Window Block?

New Window Block is developed by HG.

When did New Window Block launch?

New Window Block first shipped in 2025.

Back to the index

New Window Block

Name: New Window Block
Author: HG

mozilla.orgBrowser DevTools & extensions

New Window Block is a Firefox browser extension that blocks new tabs and windows opened by specified domains. It requires browser tab access and website permissions and is distributed through Mozilla Firefox Add-ons.

FreeWebEmbeddable

Visit mozilla.org

Overview

5 features

New Window Block is a Browser DevTools & extensions project. It focuses on preventing unwanted tabs and windows from opening on blocked websites. It is built as a consumer product for firefox users who want to control unwanted pop-ups and new windows. New Window Block costs nothing to use. New Window Block is available on the web and embeddable surfaces.

Behind New Window Block is HG, and it first shipped in 2025. Key capabilities include new window blocking, new tab blocking, and domain blocking. The interface is available in 32 languages, including Czech, German, and Greek.

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

New window blocking
New tab blocking
Domain blocking
Permission controls
Version history

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

Indexed16 Sep · 19:12 UTC
New Window Block verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about New Window Block

What is New Window Block?: New Window Block focuses on preventing unwanted tabs and windows from opening on blocked websites. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is New Window Block for?: New Window Block is a consumer product built for firefox users who want to control unwanted pop-ups and new windows.
Is New Window Block free?: Yes — New Window Block is free to use.
What platforms does New Window Block run on?: New Window Block runs on the web and embeddable surfaces.
Is New Window Block still active?: Unverified. New Window Block 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 New Window Block?: Similar projects tracked by PulseGate include Private Window Blocker, Private Window Blocker, and WebBlock.Private Window Blocker Private Window Blocker WebBlock
Who makes New Window Block?: New Window Block is developed by HG.
When did New Window Block launch?: New Window Block first shipped in 2025.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users who want to control unwanted pop-ups and new windows
Model: B2C
Solves: Preventing unwanted tabs and windows from opening on blocked websites.

Registered as

Firefox Add-ons: new-window-block

Developer

Index record

Indexed: 16 Sep 2026
Lifecycle: Alive
Last seen: 16 Sep 2026

Identity audit (13)

Slug: new-window-block-mozilla-org
Lifecycle state recorded: 16 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 16 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
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: 16 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/new-window-block

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