Who should use Youtube Theme?

Youtube Theme is a consumer product built for firefox users who want quick YouTube theme switching.

Is Youtube Theme free?

Yes — Youtube Theme is free to use.

What platforms does Youtube Theme run on?

Youtube Theme runs on the web and embeddable surfaces.

Is Youtube Theme still maintained?

Unverified. Youtube Theme 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 projects are similar to Youtube Theme?

Similar projects tracked by PulseGate include Dark YouTube Theme, YouTube Dark Mode, and Youtube UI.

Who develops Youtube Theme?

Youtube Theme is developed by Light Alex.

When did Youtube Theme launch?

Youtube Theme first shipped in 2018.

Back to the index

Youtube Theme

Name: Youtube Theme
Author: Light Alex

mozilla.orgBrowser DevTools & extensions

Youtube Theme is a Firefox browser extension that lets users switch YouTube between dark and light designs with one click. It is intended for individual Firefox users who want a quick appearance toggle while browsing YouTube.

FreeWebEmbeddable

Visit mozilla.org

1alternative

5features

2018since

Overview

5 features

In the Browser DevTools & extensions space, Youtube Theme takes a focused approach. It focuses on switching YouTube between dark and light designs without manually changing settings. It is built as a consumer product for firefox users who want quick YouTube theme switching. It is available for free. It ships for the web and embeddable surfaces.

Behind Youtube Theme is Light Alex, and it first shipped in 2018. Key capabilities include dark mode toggle, light mode toggle, and one-click switching. The interface is available in 32 languages, including Czech, German, and Greek.

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

Dark mode toggle
Light mode toggle
One-click switching
YouTube customization
Firefox integration

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 · 17:42 UTC
Youtube Theme verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Youtube Theme

What is Youtube Theme?: Youtube Theme focuses on switching YouTube between dark and light designs without manually changing settings. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Youtube Theme?: Youtube Theme is a consumer product built for firefox users who want quick YouTube theme switching.
Is Youtube Theme free?: Yes — Youtube Theme is free to use.
What platforms does Youtube Theme run on?: Youtube Theme runs on the web and embeddable surfaces.
Is Youtube Theme still maintained?: Unverified. Youtube Theme 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 projects are similar to Youtube Theme?: Similar projects tracked by PulseGate include Dark YouTube Theme, YouTube Dark Mode, and Youtube UI.Dark YouTube Theme YouTube Dark Mode Youtube UI
Who develops Youtube Theme?: Youtube Theme is developed by Light Alex.
When did Youtube Theme launch?: Youtube Theme first shipped in 2018.

At a glance

Pricing: Free
Platforms: Web
First seen: 12 Sep 2026
Built for: Firefox users who want quick YouTube theme switching
Model: B2C
Solves: Switching YouTube between dark and light designs without manually changing settings.

Registered as

Firefox Add-ons: youtube-theme-changer

Developer

Light Alex

Index record

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

Identity audit (13)

Slug: youtube-theme-mozilla-org
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: 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 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/youtube-theme-changer

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

Similar projects

Closest matches by what these projects do