Firefox Browser Add-ons
  • Extensions
  • Themes
    • for Firefox
    • Dictionaries & Language Packs
    • Other Browser Sites
    • Add-ons for Android
Log in
Preview of YuzuLingo — Hardsub OCR and Language Reader

YuzuLingo — Hardsub OCR and Language Reader by YuzuLingo

Read and look up hardsubs on web videos. Fast on-device OCR, hover dictionary, Furigana and Pinyin overlays for CJK, English and Spanish.

0 (0 reviews)0 (0 reviews)
Download Firefox and get the extension
Download file

Extension Metadata

Screenshots
About this extension
Turn hardsubbed web videos into interactive language lessons.

YuzuLingo uses fast, on-device text recognition (OCR) to make burned-in hardsubs hoverable, searchable, and easy to read directly inside your browser's video players.

🌟 KEY FEATURES

• Hover-to-Lookup: Hover over burned-in hardsubs on YouTube, Bilibili, and open web video players to get instant dictionary definitions.
• Furigana and Pinyin Overlays: Toggle phonetic reading guides directly above Kanji (Japanese) and Hanzi (Chinese) characters in real time.
• Active Recall Blur Zones: Mask hardsubs with customizable blur or solid covers to test your listening first, then hover or hold a hotkey to reveal.
• 5 Language Engines: Comprehensive OCR and dictionary lookup support for Japanese, Chinese (Simplified and Traditional), Korean, English, and Spanish.
• 100% On-Device and Private: Video frames and OCR text recognition run entirely inside your browser. Video content is never uploaded to external servers.

🎯 PERFECT FOR

• Japanese learners watching anime or YouTube channels with burned-in hardsubs.
• Chinese learners watching Bilibili, Youku, or dramas with hardcoded Chinese subtitles.
• Korean, English, and Spanish learners looking to read native video content effortlessly.
• Immersion language learners practicing Mass Immersion or active listening methodologies.

🚀 GET STARTED IN 10 SECONDS
  1. Add YuzuLingo to your browser and pin it to your extension toolbar.
  2. Open any video player containing burned-in subtitles.
  3. Draw a zone over the subtitle area and hover over words to view lookups.

(Roadmap Note: Saved vocabulary bank and Anki export integrations are under active development for upcoming releases.)

Have questions or feature requests? Visit yuzulingo.com or contact us at hello@yuzulingo.com.
Rated 0 by 0 reviewers
Log in to rate this extension
There are no ratings yet

Star rating saved

5
0
4
0
3
0
2
0
1
0
No reviews yet
Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
Learn more
More information
Add-on Links
  • Homepage
  • Support site
  • Support Email
  • Copy add-on ID
Version
0.1.3
Size
58.33 MB
Last updated
an hour ago (Sep 30, 2026)
Related Categories
  • Language Support
  • Photos, Music & Videos
License
All Rights Reserved
Privacy Policy
Read the privacy policy for this add-on
Version History
  • See all versions
Add to collection
Report this add-on
Go to Mozilla's homepage

Add-ons

  • About
  • Firefox Add-ons Blog
  • Extension Workshop
  • Developer Hub
  • Developer Policies
  • Community Blog
  • Forum
  • Report a bug
  • Review Guide

Download

  • Download Firefox
  • Windows
  • macOS
  • iOS
  • Android
  • Linux
  • All

Latest Builds

  • Nightly
  • Beta

Firefox for Business

  • Enterprise

Community

  • Connect
  • Contribute
  • Developer

Follow

  • Instagram
  • YouTube
  • TikTok
  • Bluesky
  • Podcast
  • Privacy
  • Cookies
  • Legal

Except where otherwise noted, content on this site is licensed under the Creative Commons Attribution Share-Alike License v3.0 or any later version.