# Sensim — Learn, without really trying.

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

Canonical page: [https://chrome-stats.com/d/sensim](https://chrome-stats.com/d/sensim)

## Overview

- **ID:** `sensim`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Justin
- **Category:** appearance,language-support,alerts-updates
- **Daily users:** 3
- **Version:** 9.8.0
- **Last updated:** 2026-07-23
- **First published:** 2026-06-01
- **Size:** 543 KB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/sensim/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/sensim/privacy/](https://addons.mozilla.org/firefox/addon/sensim/privacy/)

## Description

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.

<strong>How it works:</strong>
- 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

<strong>1,000-day journey. 3,000 words. 100 languages.</strong>

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.

## Rankings

- #55,771 — Overall
- #78 — learn
- #106 — flashcards

## Permissions and access

### Permissions

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

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** 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 has low user count. Unpopular extensions 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/sensim)