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Metronome 9000

mozilla.orgPractice tools & metronomes

PulseGate's liveness check found it on 12 Sep 2026; it is registered on Firefox Add-ons and has been in the index since 12 Sep 2026. How this is checked

Metronome 9000 is a Firefox browser extension that provides a simple metronome with adjustable tempo. It is intended for musicians and students who need a lightweight tempo tool while using Firefox.

Inferred · not functionally tested

Open SourceWebEmbeddable
Metronome 9000 preview
Visit mozilla.org

Overview

4 features

Purpose: Keeping a steady tempo while practicing or performing music.

Inferred · not functionally tested

Audience: musicians and music students

Inferred · not functionally tested

Functions: Unknown

Interfaces: API: unknown · MCP: unknown · CLI: unknown · Self-hosting: unknown

Recorded constraints: pricing: open_source · license: Open Source · platforms: WEB · deployment: browser, embeddable

Constraint provenance is unknown; confirm requirements with the publisher.

Record sources: addons.mozilla.org · addons.mozilla.org. These links do not verify the individual claims.

In the Practice tools & metronomes space, Metronome 9000 takes a focused approach. Inferred · not functionally tested: It focuses on keeping a steady tempo while practicing or performing music. Inferred · not functionally tested: It is built as an open-source project for musicians and music students. Basis unknown · not verified: The project is open source (Open Source). Basis unknown · not verified: Metronome 9000 is available on the web and embeddable surfaces.

It is developed by Radoslaw Polczyk, and it first shipped in 2018. Inferred · not functionally tested: Key capabilities include adjustable tempo, tempo notifications, and browser extension. The interface is available in 32 languages, including Czech, German, and Greek.

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

Tasks: Inferred · not functionally tested

  • Adjustable tempo
  • Tempo notifications
  • Browser extension
  • Lightweight interface

Topics: Inferred · not functionally tested

Tags
firefox-extensiontempo-practicemusic-practicemetronome

JSON profile · Text profile · Access guide

Built with & integrations

Runs on
BrowserEmbeddable

Trust & compliance

License
Open Source
Public signals
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Legal
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Indexing history

1

What PulseGate has recorded for this listing

  1. Indexed12 Sep · 06:52 UTC
    Metronome 9000 seen via Firefox Add-ons
    Source: Firefox Add-ons · Open

Frequently asked questions about Metronome 9000

What is Metronome 9000?
Inferred · not functionally tested: Metronome 9000 focuses on keeping a steady tempo while practicing or performing music. It is catalogued under Practice tools & metronomes on PulseGate.
Who should use Metronome 9000?
Inferred · not functionally tested: Metronome 9000 is an open-source project built for musicians and music students.
Is Metronome 9000 free?
Basis unknown · not verified: Yes — Metronome 9000 is open source under the Open Source license and free to use.
What platforms does Metronome 9000 run on?
Basis unknown · not verified: Metronome 9000 runs on the web and embeddable surfaces.
Is Metronome 9000 still active?
PulseGate's liveness check found it on 12 Sep 2026.
Who develops Metronome 9000?
Metronome 9000 is developed by Radoslaw Polczyk.
How long has Metronome 9000 been around?
Metronome 9000 first shipped in 2018.
Is Metronome 9000 open source?
Basis unknown · not verified: Yes — Metronome 9000 is open source under the Open Source license.

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