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Mooon: Japanese Webpage & Subtitle Reading Assistant

Chrome extension by Mooon · Productivity · Education

A Chrome extension in Productivity · Education with 3 000 users, a small but real audience.

Specific sites only: 2 match patterns.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
3 000
Rating
5.0 (11 ratings)
Users, last 15 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
1.3.8
Updated in the store
2026-08-21
Published
2025-03-04
Manifest
V3
Browser access
7 permissions, 2 site patterns

How it has moved

Users
unchanged since 01.09
3k · 2 readings
  1. 2026-09-013k
  2. 2026-09-153k
Rating
unchanged since 01.09
reviewsrating 5.00 · 2 readings
  1. 2026-09-01reviews11rating5.00
  2. 2026-09-15reviews11rating5.00
Users
unchanged since 01.09
3k · 2 readings
  1. 2026-09-013k
  2. 2026-09-153k
Rating
unchanged since 01.09
reviewsrating 5.00 · 2 readings
  1. 2026-09-01reviews11rating5.00
  2. 2026-09-15reviews11rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 2 match patterns.

  • https://www.youtube.com/*
  • https://youtube.com/*
  • See the address and title of every tab you have open tabs
  • Sign you in with a Google account identity
  • Run its own code on the pages it can access scripting
Show the remaining 4
  • Open a panel beside the page sidePanel
  • Store data in your browser storage
  • Speak text out loud tts
  • Declares windows

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

Mooon publishes 2 listings we track, 3k users between them.

  1. Latinae — Latin reader Mooon · Productivity · Education · published 2026-05-07 18 users ★ 3.0

Like this one

Listings the catalog judges closest in what they say they do.

  1. BunSense: Japanese Furigana, translation, and grammar helper Describes nearly the same job, smaller audience 167 users ★ 4.8
  2. ManabiDojo - Learn Japanese on the Web (Manga OCR, YouTube, NHK & more!) Describes nearly the same job, smaller audience 332 users ★ 4.4
  3. Japanese Reader Describes nearly the same job, smaller audience 9 users
  4. Readable Japanese Describes nearly the same job, smaller audience 45 users ★ 5.0
  5. YomiSaver Describes nearly the same job, smaller audience 13 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.