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MSJ Web Serial Management tool

Chrome extension by Magellan Systems Japan, Inc. · Productivity · Developer

A Chrome extension in Productivity · Developer with 209 users, barely installed. Audience over the last 30 days: -8.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 5 screenshots

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

Users
209
Rating
5.0 (1 ratings)
Users, last 30 days
-8
Rating, last 30 days
Steady over 30 days
Version
11.44
Updated in the store
2024-12-02
Published
2021-05-28
Manifest
V3
Browser access
No permissions declared

How it has moved

Users
-8 since 03.10
192-217 · 21 readings
  1. 2026-10-04215
  2. 2026-10-08207
  3. 2026-10-09205
  4. 2026-10-10206
  5. 2026-10-11204
  6. 2026-10-13208
  7. 2026-10-16212
  8. 2026-10-17208
  9. 2026-10-18210
  10. 2026-10-19207
  11. 2026-10-20197
  12. 2026-10-21194
  13. 2026-10-22192
  14. 2026-10-23193
  15. 2026-10-24199
  16. 2026-10-25202
  17. 2026-10-28214
  18. 2026-10-29210
  19. 2026-10-30214
  20. 2026-11-01209
  21. 2026-11-02209
Rating
unchanged since 03.10
reviewsrating 5.00 · 21 readings
  1. 2026-10-04reviews1rating5.00
  2. 2026-10-08reviews1rating5.00
  3. 2026-10-09reviews1rating5.00
  4. 2026-10-10reviews1rating5.00
  5. 2026-10-11reviews1rating5.00
  6. 2026-10-13reviews1rating5.00
  7. 2026-10-16reviews1rating5.00
  8. 2026-10-17reviews1rating5.00
  9. 2026-10-18reviews1rating5.00
  10. 2026-10-19reviews1rating5.00
  11. 2026-10-20reviews1rating5.00
  12. 2026-10-21reviews1rating5.00
  13. 2026-10-22reviews1rating5.00
  14. 2026-10-23reviews1rating5.00
  15. 2026-10-24reviews1rating5.00
  16. 2026-10-25reviews1rating5.00
  17. 2026-10-28reviews1rating5.00
  18. 2026-10-29reviews1rating5.00
  19. 2026-10-30reviews1rating5.00
  20. 2026-11-01reviews1rating5.00
  21. 2026-11-02reviews1rating5.00
Users
+15 since 31.08
192-220 · 33 readings
  1. 2026-08-31194
  2. 2026-09-03192
  3. 2026-09-06194
  4. 2026-09-07196
  5. 2026-09-08200
  6. 2026-09-10202
  7. 2026-09-15205
  8. 2026-09-16209
  9. 2026-09-20202
  10. 2026-09-25210
  11. 2026-09-26220
  12. 2026-09-28217
  13. 2026-10-04215
  14. 2026-10-08207
  15. 2026-10-09205
  16. 2026-10-10206
  17. 2026-10-11204
  18. 2026-10-13208
  19. 2026-10-16212
  20. 2026-10-17208
  21. 2026-10-18210
  22. 2026-10-19207
  23. 2026-10-20197
  24. 2026-10-21194
  25. 2026-10-22192
  26. 2026-10-23193
  27. 2026-10-24199
  28. 2026-10-25202
  29. 2026-10-28214
  30. 2026-10-29210
  31. 2026-10-30214
  32. 2026-11-01209
  33. 2026-11-02209
Rating
unchanged since 31.08
reviewsrating 5.00 · 33 readings
  1. 2026-08-31reviews1rating5.00
  2. 2026-09-03reviews1rating5.00
  3. 2026-09-06reviews1rating5.00
  4. 2026-09-07reviews1rating5.00
  5. 2026-09-08reviews1rating5.00
  6. 2026-09-10reviews1rating5.00
  7. 2026-09-15reviews1rating5.00
  8. 2026-09-16reviews1rating5.00
  9. 2026-09-20reviews1rating5.00
  10. 2026-09-25reviews1rating5.00
  11. 2026-09-26reviews1rating5.00
  12. 2026-09-28reviews1rating5.00
  13. 2026-10-04reviews1rating5.00
  14. 2026-10-08reviews1rating5.00
  15. 2026-10-09reviews1rating5.00
  16. 2026-10-10reviews1rating5.00
  17. 2026-10-11reviews1rating5.00
  18. 2026-10-13reviews1rating5.00
  19. 2026-10-16reviews1rating5.00
  20. 2026-10-17reviews1rating5.00
  21. 2026-10-18reviews1rating5.00
  22. 2026-10-19reviews1rating5.00
  23. 2026-10-20reviews1rating5.00
  24. 2026-10-21reviews1rating5.00
  25. 2026-10-22reviews1rating5.00
  26. 2026-10-23reviews1rating5.00
  27. 2026-10-24reviews1rating5.00
  28. 2026-10-25reviews1rating5.00
  29. 2026-10-28reviews1rating5.00
  30. 2026-10-29reviews1rating5.00
  31. 2026-10-30reviews1rating5.00
  32. 2026-11-01reviews1rating5.00
  33. 2026-11-02reviews1rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

We have not read this listing's manifest since we started keeping permission names. The counts above come from the last time we did.

The full permission history for this extension

What changed recently

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

The publisher

Magellan Systems Japan, Inc..

Like this one

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

  1. GPS Serial Bridge Describes nearly the same job, smaller audience 21 users
  2. SiK Radio Tools Describes nearly the same job, smaller audience 17 users
  3. SiK Radio Tools Describes nearly the same job, smaller audience 178 users
  4. openLRSng - Configurator Describes nearly the same job, smaller audience 1k users ★ 5.0
  5. HidnSeek Flash Updater Describes nearly the same job, smaller audience 3 users (last published figure)

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.

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Users and rating on Ext Ops Panel

Markdown

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Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-11-01. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built