# SmartSpell

> Fast, private better spell checking for Firefox with contextual suggestions, red squiggles, and right-click corrections. Runs locally in your browser.

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

## Overview

- **ID:** `smartspell`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** John
- **Category:** language-support
- **Daily users:** 3
- **Weekly downloads:** 2
- **Version:** 3.4.0
- **Last updated:** 2026-08-25
- **First published:** 2026-08-10
- **Size:** 2.50 MB
- **Data as of:** 2026-09-03
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/smartspell/)

## Description

Smart Spell replaces basic dictionary-only spell checking with faster, context-aware spelling correction directly inside Firefox.

Features:

Red wavy underlines for likely misspellings
Right-click correction suggestions
Context-aware ranking using word and bigram frequency data
Works in text fields and contenteditable editors across websites
Add words to a personal Smart Dictionary
Runs entirely locally
No typed text is sent to Google or any other external service
No analytics, tracking, advertising, or account required

Smart Spell uses English frequency data derived from the SymSpell project. The included frequency dictionary combines Google Books Ngram frequency information with SCOWL English vocabulary data.

Smart Spell is currently designed for desktop Firefox.

## Rankings

- #57,142 — Overall
- #139 — smart tool
- #142 — smartbook
- #159 — smart
- #172 — smartphone
- #230 — spelling

## Permissions and access

### Permissions

- `storage`
- `menus`
- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension was recently updated in the past month. New updates 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/smartspell)