Who should use YouTube 4K Downloader?

YouTube 4K Downloader is a consumer product built for firefox users who download YouTube videos or audio.

Does YouTube 4K Downloader have a free plan?

Yes — YouTube 4K Downloader is free to use.

What platforms does YouTube 4K Downloader run on?

YouTube 4K Downloader runs on the web and embeddable surfaces.

Is YouTube 4K Downloader still active?

Unverified. YouTube 4K Downloader 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 YouTube 4K Downloader?

Similar projects tracked by PulseGate include TikSave Free, All Video Downloader & Player, and Pinvids.

Who makes YouTube 4K Downloader?

YouTube 4K Downloader is developed by Extension Kit.

When did YouTube 4K Downloader launch?

YouTube 4K Downloader first shipped in 2024.

Back to the index

YouTube 4K Downloader

Name: YouTube 4K Downloader
Author: Extension Kit

mozilla.orgDownloaders & offline video

YouTube 4K Downloader is a Firefox browser extension that downloads YouTube videos in formats such as MP4 and WEBM, and extracts audio as MP3, M4A, or WebM. It supports multiple resolutions, frame rates, HDR, and high-definition downloads.

FreeWebEmbeddable

Visit mozilla.org

Overview

10 features

YouTube 4K Downloader is a Downloaders & offline video project. It focuses on downloading YouTube videos and audio in the desired quality and file format. YouTube 4K Downloader is a consumer product aimed at firefox users who download YouTube videos or audio. It is available for free. It ships for the web and embeddable surfaces.

Extension Kit builds and maintains YouTube 4K Downloader, and it first shipped in 2024. Among its 10 catalogued features are video downloads, audio extraction, and MP4 export. The interface is available in 32 languages, including Czech, German, and Greek.

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

Video downloads
Audio extraction
MP4 export
WEBM export
M4A export
MP3 conversion
4K downloads
8K downloads
HDR support
Frame-rate options

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

Indexed9 Sept · 11:35 UTC
YouTube 4K Downloader verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about YouTube 4K Downloader

What is YouTube 4K Downloader?: YouTube 4K Downloader focuses on downloading YouTube videos and audio in the desired quality and file format. It is catalogued under Downloaders & offline video on PulseGate.
Who should use YouTube 4K Downloader?: YouTube 4K Downloader is a consumer product built for firefox users who download YouTube videos or audio.
Does YouTube 4K Downloader have a free plan?: Yes — YouTube 4K Downloader is free to use.
What platforms does YouTube 4K Downloader run on?: YouTube 4K Downloader runs on the web and embeddable surfaces.
Is YouTube 4K Downloader still active?: Unverified. YouTube 4K Downloader 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 YouTube 4K Downloader?: Similar projects tracked by PulseGate include TikSave Free, All Video Downloader & Player, and Pinvids.TikSave Free All Video Downloader & Player Pinvids
Who makes YouTube 4K Downloader?: YouTube 4K Downloader is developed by Extension Kit.
When did YouTube 4K Downloader launch?: YouTube 4K Downloader first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users who download YouTube videos or audio
Model: B2C
Solves: Downloading YouTube videos and audio in the desired quality and file format.

Registered as

Firefox Add-ons: youtube-massdownloader

Developer

Extension Kit

Index record

Indexed: 9 Sept 2026
Lifecycle: Alive
Last seen: 9 Sept 2026

Identity audit (12)

Slug: youtube-4k-downloader-mozilla-org
Lifecycle state recorded: 9 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 9 Sept 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.
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/youtube-massdownloader

Ship this? Send a correction — no account, and you get a link to follow it.

Also in Downloaders & offline video

Same category — not a similarity match