Track Your Immersion Automatically
YouTube, Netflix, Crunchyroll, Prime Video & Disney+ — we count the time for you.
Why use the extension?
Auto Tracking
Just hit play — we handle the rest. No manual timers, no forgetting.
Ad-Free Counting
Ads don't count towards your immersion time. Only real content.
Cross-Device Sync
Create a free account to sync your stats across all your devices.
Block & Filter
Block channels or titles you don't want tracked. Train it for your language.
How it works
Install the extension
Install from the Chrome Web Store or Firefox Add-ons. Then click the puzzle icon in your toolbar and pin "JP343 Streaming Tracker".
Watch Japanese content
Play any video on YouTube, Netflix, Crunchyroll, Prime Video or Disney+. The extension detects it automatically.
Sync to JP343
Create a free account and your tracked time syncs automatically across devices.
Frequently asked questions
Do I need a JP343 account?
No! The extension works standalone. Create an account only if you want to sync across devices or access your data from the website.
Is my data private?
Yes. Your watch history stays between your browser and JP343. No third parties are involved, ever.
Which browsers are supported?
Chrome and Firefox. Install directly from the Chrome Web Store or Firefox Add-ons.
Will it slow down my browser?
No. The extension only activates on supported streaming sites. It uses minimal resources and doesn't run in the background.
Ready to track automatically?
Install now and never forget to log your immersion time again.