What does HTML File Viewer do?

HTML File Viewer focuses on viewing the HTML source of the current web page directly in Firefox. It is catalogued under Browser DevTools & extensions on PulseGate.

Who is HTML File Viewer for?

HTML File Viewer is a consumer product built for firefox users and web developers.

Does HTML File Viewer have a free plan?

Yes — HTML File Viewer is free to use.

What platforms does HTML File Viewer run on?

HTML File Viewer runs on the web, embeddable surfaces, macOS, Windows, and Linux.

Is HTML File Viewer still active?

Unverified. HTML File Viewer 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 HTML File Viewer?

Similar projects tracked by PulseGate include HAR File Viewer, Headers Viewer, and Markdown Viewer.

Who makes HTML File Viewer?

HTML File Viewer is developed by SHBET.

How long has HTML File Viewer been around?

HTML File Viewer first shipped in 2024.

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HTML File Viewer

Name: HTML File Viewer
Author: SHBET

mozilla.orgBrowser DevTools & extensions

HTML File Viewer is a Firefox browser extension that displays the HTML file of the current web page. It is intended for Firefox users and web developers who need a lightweight way to inspect page markup.

FreeWebEmbeddablemacOSWindowsLinux

Visit mozilla.org

Overview

3 features

HTML File Viewer is a Browser DevTools & extensions project. It focuses on viewing the HTML source of the current web page directly in Firefox. It is built as a consumer product for firefox users and web developers. HTML File Viewer is free to use. HTML File Viewer is available on the web, embeddable surfaces, macOS, Windows, and Linux.

Behind HTML File Viewer is SHBET, and it first shipped in 2024. Key capabilities include HTML source viewing, current page inspection, and firefox integration. The interface is available in 32 languages, including Czech, German, and Greek.

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

HTML source viewing
Current page inspection
Firefox integration

Built with & integrations

Runs on

BrowserEmbeddablemacOSWindowsLinux

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed14 Sep · 05:19 UTC
HTML File Viewer verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about HTML File Viewer

What does HTML File Viewer do?: HTML File Viewer focuses on viewing the HTML source of the current web page directly in Firefox. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is HTML File Viewer for?: HTML File Viewer is a consumer product built for firefox users and web developers.
Does HTML File Viewer have a free plan?: Yes — HTML File Viewer is free to use.
What platforms does HTML File Viewer run on?: HTML File Viewer runs on the web, embeddable surfaces, macOS, Windows, and Linux.
Is HTML File Viewer still active?: Unverified. HTML File Viewer 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 HTML File Viewer?: Similar projects tracked by PulseGate include HAR File Viewer, Headers Viewer, and Markdown Viewer.HAR File Viewer Headers Viewer Markdown Viewer
Who makes HTML File Viewer?: HTML File Viewer is developed by SHBET.
How long has HTML File Viewer been around?: HTML File Viewer first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Built for: Firefox users and web developers
Model: B2C
Solves: Viewing the HTML source of the current web page directly in Firefox.

Registered as

Firefox Add-ons: html-file-viewer

Developer

SHBET

Index record

Indexed: 14 Sep 2026
Lifecycle: Alive
Last seen: 14 Sep 2026

Identity audit (13)

Slug: html-file-viewer-mozilla-org
Lifecycle state recorded: 14 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 14 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: 14 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/html-file-viewer

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