# jp343 Track Your Japanese Immersion

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

Canonical page: [https://chrome-stats.com/d/jp343-immersion-tracker](https://chrome-stats.com/d/jp343-immersion-tracker)

## Overview

- **ID:** `jp343-immersion-tracker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** jp343
- **Category:** language-support,photos-music-videos
- **Daily users:** 23
- **Weekly downloads:** 1
- **Version:** 2.13.1
- **Last updated:** 2026-09-03
- **First published:** 2026-02-17
- **Size:** 624 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/jp343-immersion-tracker/)
- **Website:** [https://jp343.com/](https://jp343.com/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/jp343-immersion-tracker/privacy/](https://addons.mozilla.org/firefox/addon/jp343-immersion-tracker/privacy/)

## Description

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 <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/e7477ee9905309080ac8cd06cb2290521e614d9cd09bb7c075985a0a45f9cc90/http%3A//jp343.com" rel="nofollow">jp343.com</a> 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:
1. Play something on a supported site
2. The tracker starts on its own
3. Check your stats in the popup or open the full dashboard

Questions or feedback? Join us on Discord: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/3dbd1f5e9a394b766d8266bd0e60c85ddcd81d25af7bbdc642ebda2919cc2e54/https%3A//discord.gg/B9kG2rGhUf" rel="nofollow">https://discord.gg/B9kG2rGhUf</a>

## Rankings

- #23,132 — Overall
- #126 — tracking
- #158 — version

## Permissions and access

### Permissions

- `storage`
- `unlimitedStorage`
- `tabs`
- `alarms`
- `contextMenus`
- `notifications`
- `*://*.youtube.com/*`
- `*://*.netflix.com/*`
- `*://*.crunchyroll.com/*`
- `*://*.primevideo.com/*`
- `*://*.amazon.com/*`
- `*://*.amazon.de/*`
- `*://*.amazon.co.jp/*`
- `*://*.amazon.com.br/*`
- `*://*.disneyplus.com/*`
- `*://*.cijapanese.com/*`
- `*://*.nijapanese.com/*`
- `*://*.nihongo-jikan.com/*`
- `*://open.spotify.com/*`
- `*://*.twitch.tv/*`
- `*://app.asbplayer.dev/*`
- `*://jp343.com/*`
- `*://*.jp343.com/*`

### Content script matches

- `app.asbplayer.dev`
- `*.cijapanese.com`
- `*.nijapanese.com`
- `*.crunchyroll.com`
- `*.disneyplus.com`
- `*.jp343.com`
- `jp343.com`
- `*.netflix.com`
- `*.youtube.com`
- `*.amazon.co.jp`
- `*.amazon.com.br`
- `*.amazon.com`
- `*.amazon.de`
- `*.primevideo.com`
- `open.spotify.com`
- `*.twitch.tv`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/jp343-immersion-tracker)