What does Website Dimmer do?

Website Dimmer focuses on reducing website brightness and eye strain during nighttime browsing. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is Website Dimmer for?

Website Dimmer is a consumer product built for firefox users who want a darker browsing experience.

Does Website Dimmer have a free plan?

Yes — Website Dimmer is free to use.

What platforms does Website Dimmer run on?

Website Dimmer runs on the web and embeddable surfaces.

Is Website Dimmer still active?

Unverified. Website Dimmer 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 Website Dimmer?

Similar projects tracked by PulseGate include Page Dimmer, Dark Viewer, and Darker Background Brighter Font.

Who makes Website Dimmer?

Website Dimmer is developed by no9.

How long has Website Dimmer been around?

Website Dimmer first shipped in 2022.

Back to the index

Website Dimmer

Name: Website Dimmer
Author: no9

mozilla.orgBrowser DevTools & extensions

Website Dimmer is a Firefox browser extension that changes website background and text colors to create a darker browsing experience. It applies night-mode styling across HTML-based websites for users browsing in low-light conditions.

FreeWebEmbeddable

Visit mozilla.org

Overview

5 features

Website Dimmer sits in PulseGate's Browser DevTools & extensions category. It focuses on reducing website brightness and eye strain during nighttime browsing. It is built as a consumer product for firefox users who want a darker browsing experience. Website Dimmer costs nothing to use. It runs on the web and embeddable surfaces.

It is developed by no9, and it first shipped in 2022. Key capabilities include background dimming, text color changes, and night mode. The interface is available in 32 languages, including Czech, German, and Greek.

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

Background dimming
Text color changes
Night mode
All-site support
Color customization

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

Indexed15 Sep · 18:52 UTC
Website Dimmer verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Website Dimmer

What does Website Dimmer do?: Website Dimmer focuses on reducing website brightness and eye strain during nighttime browsing. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Website Dimmer for?: Website Dimmer is a consumer product built for firefox users who want a darker browsing experience.
Does Website Dimmer have a free plan?: Yes — Website Dimmer is free to use.
What platforms does Website Dimmer run on?: Website Dimmer runs on the web and embeddable surfaces.
Is Website Dimmer still active?: Unverified. Website Dimmer 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 Website Dimmer?: Similar projects tracked by PulseGate include Page Dimmer, Dark Viewer, and Darker Background Brighter Font.Page Dimmer Dark Viewer Darker Background Brighter Font
Who makes Website Dimmer?: Website Dimmer is developed by no9.
How long has Website Dimmer been around?: Website Dimmer first shipped in 2022.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users who want a darker browsing experience
Model: B2C
Solves: Reducing website brightness and eye strain during nighttime browsing.

Registered as

Firefox Add-ons: website-dimmer

Developer

no9

Index record

Indexed: 15 Sep 2026
Lifecycle: Alive
Last seen: 15 Sep 2026

Identity audit (13)

Slug: website-dimmer-mozilla-org
Lifecycle state recorded: 15 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 15 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.
Last updated: 15 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/website-dimmer

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