Who should use Window Fullscreen?

Window Fullscreen is an open-source project built for youTube viewers using Chrome or Firefox.

Is Window Fullscreen free?

Yes — Window Fullscreen is open source under the Open Source license and free to use.

What platforms does Window Fullscreen run on?

Window Fullscreen runs on the web and embeddable surfaces.

Is Window Fullscreen still active?

Unverified. Window Fullscreen 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 Window Fullscreen?

Similar projects tracked by PulseGate include YouTube Windowed FullScreen, YouTube Fullscreen Fit, and Windowed fullscreen video.

Who makes Window Fullscreen?

Window Fullscreen is developed by MashdorDev.

How long has Window Fullscreen been around?

Window Fullscreen first shipped in 2026.

Back to the index

Window Fullscreen

Name: Window Fullscreen
Author: MashdorDev

github.comBrowser DevTools & extensions

Window Fullscreen for YouTube is an open-source browser extension for Chrome and Firefox. It makes the YouTube player fill the browser window while keeping the browser interface visible, providing a windowed alternative to OS-level fullscreen.

Open SourceWebEmbeddable

Visit github.com

1alternative

5features

2026since

Overview

5 features

Window Fullscreen sits in PulseGate's Browser DevTools & extensions category. It focuses on watching YouTube videos in a browser-window-sized player without entering operating-system fullscreen mode. Window Fullscreen is an open-source project aimed at youTube viewers using Chrome or Firefox. The project is open source (Open Source). It runs on the web and embeddable surfaces.

MashdorDev builds and maintains Window Fullscreen, and it first shipped in 2026. Key capabilities include windowed fullscreen, youTube player expansion, and browser-window sizing.

Windowed fullscreen
YouTube player expansion
Browser-window sizing
Chrome support
Firefox support

Built with & integrations

Connectors

chrome

Runs on

BrowserEmbeddable

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen SourceFree tierStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed12 Sep · 21:12 UTC
Window Fullscreen for YouTube verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Window Fullscreen

What does Window Fullscreen do?: Window Fullscreen focuses on watching YouTube videos in a browser-window-sized player without entering operating-system fullscreen mode. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Window Fullscreen?: Window Fullscreen is an open-source project built for youTube viewers using Chrome or Firefox.
Is Window Fullscreen free?: Yes — Window Fullscreen is open source under the Open Source license and free to use.
What platforms does Window Fullscreen run on?: Window Fullscreen runs on the web and embeddable surfaces.
Is Window Fullscreen still active?: Unverified. Window Fullscreen 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 Window Fullscreen?: Similar projects tracked by PulseGate include YouTube Windowed FullScreen, YouTube Fullscreen Fit, and Windowed fullscreen video.YouTube Windowed FullScreen YouTube Fullscreen Fit Windowed fullscreen video
Who makes Window Fullscreen?: Window Fullscreen is developed by MashdorDev.
How long has Window Fullscreen been around?: Window Fullscreen first shipped in 2026.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 12 Sep 2026
Built for: YouTube viewers using Chrome or Firefox
Model: Open source
Solves: Watching YouTube videos in a browser-window-sized player without entering operating-system fullscreen mode.

Registered as

Chrome Web Store: jghckcdnmagoohfbjplpfjbnbkpfcekl
Firefox Add-ons: window-fullscreen-for-youtube

Developer

MashdorDev

Index record

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

Identity audit (13)

Slug: window-fullscreen-for-youtube-github-com
Lifecycle state recorded: 12 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 12 Sep 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: Taken from the project's own store listing.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 12 Sep 2026
Canonical URL: https://github.com/MashdorDev/window-fullscreen-for-youtube

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