Sensim — Learn, without really trying.

Name: Sensim — Learn, without really trying.
Author: Justin

Master words through daily flashcards, then see them replace English as you browse. 3 new words per day, 1000-day journey.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-07-26

Version:

9.8.0

Last updated: 2026-07-23

Features & Capabilities

Sensim replaces English words on every page you browse with their equivalent in your chosen language — but only words you've already proven you know.

How it works:

3 new words unlock every day
Review them in your daily flashcard deck (under 2 minutes)
Get a word right 3 out of 4 days and it graduates to your browser
Graduated words appear on every page you visit as passive reinforcement
Hover any substituted word to see its English meaning
If you keep hovering a word too often, it returns to your deck automatically

1,000-day journey. 3,000 words. 100 languages.

Supports Spanish, French, German, Japanese, Korean, Chinese, Arabic, Hindi, Russian, Portuguese, Italian, Turkish, Persian, Swahili, and 85 more — including Cherokee, Nahuatl, Welsh, Hawaiian, Tibetan, and other indigenous and endangered languages.

All progress stored locally. No account required. No ads. Ever.

User Growth & Download Statistics

Add-on

By:

Justin

Daily users:

Version:

9.8.0 Last updated: 2026-07-23

Version code:

6371330

Creation date:

2026-06-01

Risk:

Permissions:

storage
alarms
tabs
https://tducpibeqzcsacmgnmwv.supabase.co/*

Content scripts matches:

<all_urls>

Size:

542.81KB

Email:

ju*****@gmail.com

URLs:

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-26

Compare stats and ranking:

Ranking

# 54,648 ▲ 63

Other rankings

#72 in learn keyword 29 #100 in flashcards keyword 13

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:

Justin

Firefox Add-ons Store

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

Email:

ju*****@gmail.com

Is Sensim — Learn, without really trying. 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.

Sensim — Learn, without really trying. requires some sensitive permissions that could impact your browser and data security. 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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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.

Sensim — Learn, without really trying. 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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