jp343 Track Your Japanese Immersion

Name: jp343 Track Your Japanese Immersion
Author: jp343

By: jp343

Tracks your Japanese immersion time automatically. Sessions are saved locally and can be synced to your account.

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Install

Features & Capabilities

jp343 is an immersion tracker for Japanese learners. It records your watch time automatically on YouTube, popular streaming sites and Spotify. Your progress is shown in a built-in dashboard with heatmap, streaks and session history.

The extension runs in the background while you watch. Ads are detected and excluded from your time. If your browser crashes, the session is recovered on restart. You can also track any other site manually with one click.

Features:

Automatic tracking on supported streaming sites
Block channels or titles you don't want tracked
Edit session titles anytime
All tracking data stays in your browser, no third-party analytics, no ads. Optional anonymous platform compatibility statistics help detect issues early.
Optional account syncs your data exclusively to jp343.com via HTTPS

Built for Japanese immersion but works for any language. Whether you do AJATT, Refold or your own method, jp343 tracks your input hours so you can see your progress over time.

Optional: Create a free account to sync across devices.

Firefox for Android: YouTube and CI Japanese are fully supported. Some streaming sites redirect to their native apps on mobile.

How to use:

Play something on a supported site
The tracker starts on its own
Check your stats in the popup or open the full dashboard

Questions or feedback? Join us on Discord: https://discord.gg/B9kG2rGhUf

User Growth & Download Statistics

Add-on

By:

jp343

Daily users:

15 4

Version:

2.8.6 Last updated: 2026-06-09

Version code:

6299813

Creation date:

2026-02-17

Risk:

Permissions:

storage
unlimitedStorage
tabs
alarms
contextMenus
*://*.youtube.com/*
*://*.netflix.com/*
*://*.crunchyroll.com/*
*://*.primevideo.com/*
*://*.amazon.com/*

Content scripts matches:

app.asbplayer.dev
*.cijapanese.com
*.nijapanese.com
*.crunchyroll.com
*.disneyplus.com
*.jp343.com
jp343.com
*.netflix.com
*.youtube.com
*.amazon.co.jp

Size:

480.10KB

Email:

in*****@jp343.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-15

Compare stats and ranking:

Ranking

# 27,107 ▲ 3,860

Other rankings

#142 in tracking keyword 41 ▲ 24#194 in version keyword 39 ▲ 39

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

jp343

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/jp343-immersion-tracker/

Email:

in*****@jp343.com

Website:

https://jp343.com/

Permission Change History

2026-06-08: Version 2.8.4 → 2.8.5

Add Permissions: *://app.asbplayer.dev/*

2026-06-07: Version 2.8.3 → 2.8.4

Add Permissions: *://*.nijapanese.com/* *://*.nihongo-jikan.com/* *://*.twitch.tv/*

2026-05-06: Version 2.5.3 → 2.6.0

Add Permissions: unlimitedStorage

2026-04-26: Version 2.4.7 → 2.4.8

Add Permissions: contextMenus

2026-04-01: Version 2.2.4 → 2.3.0

Add Permissions: *://open.spotify.com/*

2026-03-26: Version 2.1.1 → 2.2.0

Add Permissions: *://*.amazon.com.br/* *://*.disneyplus.com/* *://*.cijapanese.com/*

Remove Permissions: *://*.amazon.co.uk/*

Is jp343 Track Your Japanese Immersion Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

jp343 Track Your Japanese Immersion requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

jp343 Track Your Japanese Immersion may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****