VocabRadar

Name: VocabRadar
Author: VocabRadar.com

By: VocabRadar.com Add-on

Find your own new words: YouTube/Bilibili videos, any web page, plus AI chat. No sign-up. One glance, one new word.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-09-10

Version:

0.3.2

Last updated: 2026-09-09

Features & Capabilities

VocabRadar — discover your own new words in the content you were going to watch or read anyway.

[Learn words from videos] · On Bilibili / YouTube video pages, a side panel shows the subtitle list with your new words highlighted, plus a word list for the video. · Subtitles can be overlaid on the video with highlights and inline translations. · Notes switch between compact (word + gloss) and detailed (headword, full senses, word-list tags, frequency band). · Click a subtitle timestamp to jump straight to that line. · One click copies the annotated subtitles to the comment box, or exports your word list.

[Learn words from the web] · On any web page: new words highlighted in the body text, side annotations, hover definitions, right-click lookup. · The in-page sidebar collects the page's new words with their sentences.

[Learn even without subtitles] · Built-in local speech recognition (Whisper) turns subtitle-less videos, recordings, or uploaded audio/video into learnable text. · OCR reads text in the current video frame (burned-in subtitles, slides).

[AI chat] · A built-in chat window works with free built-in models, or fill in your own OpenAI / Anthropic-compatible key.

[Why "your own new words"] · Words are flagged by frequency threshold: common words stay quiet, rare words get flagged. You tune the threshold. · Word-frequency and word-list data ship inside the extension — lookups need no account and never upload your browsing history.

No sign-up, no account. Install and learn.

User Growth & Download Statistics

Add-on

By:

VocabRadar.com

Daily users:

Version:

0.3.2 Last updated: 2026-09-09

Version code:

6472813

Creation date:

2026-09-04

Firefox add-on GUID:

vocabradar@vocabradar.app

Firefox add-on numeric ID:

3066183

Firefox on Android:

Risk:

Permissions:

Host permissions:

*://*.bilibili.com/*
*://*.youtube.com/*
<all_urls>

Content scripts matches:

*.bilibili.com
*.youtube.com
<all_urls>

Size:

8.73MB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-10

Compare stats and ranking:

Ranking

# 146,711 ▲

Other rankings

#103 in radar keyword 6 ▲

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:

VocabRadar.com

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/vocabradar/

Website:

http://vocabradar.com

Is VocabRadar 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.

VocabRadar requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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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.

VocabRadar is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

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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