nullX is a consumer product built for X users who want a distraction-free posting interface.

What platforms does nullX run on?

nullX runs on the web and embeddable surfaces.

Is nullX still active?

Unverified. nullX 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.

nullX is developed by Jun Oyamada.

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nullX

Name: nullX
Author: Jun Oyamada

mozilla.orgBrowser DevTools & extensions

nullX is a Firefox extension that hides the X/Twitter home timeline and right sidebar to create a simpler posting-focused interface. Users can toggle timeline visibility per account through the extension popup.

FreeWebEmbeddable

Visit mozilla.org

Overview

6 features

nullX is a Browser DevTools & extensions project. It focuses on removing distracting X timelines and sidebars while retaining a focused interface for posting. It is built as a consumer product for X users who want a distraction-free posting interface. It is available for free. It runs on the web and embeddable surfaces.

Behind nullX is Jun Oyamada, and it first shipped in 2026. Among its 6 catalogued features are timeline hiding, sidebar hiding, and Posting-focused UI. The interface is available in 32 languages, including Czech, German, and Greek.

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

Timeline hiding
Sidebar hiding
Posting-focused UI
Per-account controls
X domain support
Twitter domain support

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 · 01:47 UTC
nullX verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about nullX

What does nullX do?: NullX focuses on removing distracting X timelines and sidebars while retaining a focused interface for posting. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is nullX for?: nullX is a consumer product built for X users who want a distraction-free posting interface.
Is nullX free?: Yes — nullX is free to use.
What platforms does nullX run on?: nullX runs on the web and embeddable surfaces.
Is nullX still active?: Unverified. nullX 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.
Who makes nullX?: nullX is developed by Jun Oyamada.
How long has nullX been around?: nullX first shipped in 2026.
What languages does nullX support?: The interface is available in 32 languages, including Czech, German, and Greek.

At a glance

Pricing: Free
Platforms: Web
First seen: 9 Sept 2026
Built for: X users who want a distraction-free posting interface
Model: B2C
Solves: Removing distracting X timelines and sidebars while retaining a focused interface for posting.

Registered as

Firefox Add-ons: nullx

Developer

Jun Oyamada

Index record

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

Identity audit (13)

Slug: nullx-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 (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: 9 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/nullx

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