# Aar318's Smart Proofreader

> \*\*Aar318's Smart Proofreader: Private Writing Help\*\* Catch spelling, grammar, punctuation, agreement, word-choice, and repetition mistakes without sending your writing to an online proofreading service.

Canonical page: [https://chrome-stats.com/d/aar318-s-smart-proofreader](https://chrome-stats.com/d/aar318-s-smart-proofreader)

## Overview

- **ID:** `aar318-s-smart-proofreader`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Aar318
- **Category:** language-support
- **Daily users:** 1
- **Weekly downloads:** 1
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.1.0.0
- **Last updated:** 2026-08-08
- **First published:** 2026-08-02
- **Size:** 10 MB
- **Data as of:** 2026-09-04
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/aar318-s-smart-proofreader/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/aar318-s-smart-proofreader/privacy/](https://addons.mozilla.org/firefox/addon/aar318-s-smart-proofreader/privacy/)

## Description

<strong>Aar318's Smart Proofreader: Private Writing Help</strong>

Catch spelling, grammar, punctuation, agreement, word-choice, and repetition mistakes without sending your writing to an online proofreading service.

Aar318's Smart Proofreader works in standard text boxes and compatible rich-text editors across the web. The bundled Harper engine performs proofreading locally in your browser, with no account, writing analytics, or remote grammar endpoint.

<strong>New Features (v1.1.0.0)</strong>
<ul><li>The Obvious and Expanded correction cards in Settings are now the mode buttons; the duplicate dropdown has been removed.</li><li>After a correction, the cursor moves to the end of the edited text so new writing continues in the expected place.</li><li>Added Slow Typing Mode, which waits at least four seconds after the last keystroke before proofreading.</li></ul>
<strong>Getting Started</strong>
<ol><li>Type in a supported writing field and pause briefly to see the issue count.</li><li>Select the small field badge, the toolbar icon, or <strong>Check Current Writing Field</strong> from the extension-icon right-click menu.</li><li>Review each suggestion and choose the change you want. Nothing is submitted or sent automatically.</li><li>Optional automatic correction can be enabled for conservative fixes. It is off by default.</li></ol>
The full Settings page opens automatically after the first installation so the privacy, correction, dialect, site, and support choices are easy to review.

<strong>Key Features</strong>
<ul><li><strong>Local Spelling and Grammar Checking:</strong> Proofreads on-device with the bundled Harper WebAssembly engine.</li><li><strong>Useful Writing Checks:</strong> Finds many spelling, typo, grammar, punctuation, agreement, word-choice, capitalization, and repeated-word issues.</li><li><strong>Review Before Changing:</strong> Apply individual suggestions, use <strong>Fix Obvious</strong>, ignore an issue once, or add a legitimate word to your personal dictionary.</li><li><strong>Two Clear Automatic Modes:</strong> Automatic correction is off by default. <strong>Obvious fixes only</strong> is recommended and changes the safest clear mistakes while skipping uncertainty. <strong>Expanded spelling and grammar</strong> catches more close spelling, agreement, punctuation, and word-choice issues, but can occasionally make the wrong guess.</li><li><strong>Transposition-Aware Obvious Fixes:</strong> Safely recognizes adjacent-letter swaps when Harper ranks the swapped spelling first, such as <code>tseting</code> to <code>testing</code>, even when alternative manual suggestions are available.</li><li><strong>Expanded Close-Spelling Fixes:</strong> Expanded mode can use a close top-ranked spelling suggestion such as <code>autmatically</code> to <code>automatically</code>.</li><li><strong>Smarter General Spelling:</strong> Ordinary typos are handled by a bundled 40,000-word frequency dictionary plus roughly 240,000 nearby-word patterns instead of an ever-growing list of word-specific patches. Expanded mode can use context to favor <code>good</code> in <code>pretty gud</code> and <code>testing</code> in <code>my own tesng</code>, while keeping all processing offline.</li><li><strong>Respectful Backspace:</strong> Editing a corrected word with Backspace is treated as rejecting that automatic change, so a nearby incomplete spelling is not repeatedly restored. Deleting and typing the word again enables a fresh check.</li><li><strong>User Edits Win:</strong> <code>Ctrl+A</code> and Backspace can clear the entire message after a correction. Pending rich-editor work checks the draft between replacements and stops immediately if the user has changed it.</li><li><strong>Safe Undo:</strong> Reverts the last automatic correction only while the field still matches the corrected text.</li><li><strong>Multiple Ways to Check:</strong> Use the toolbar, Alt+Shift+P, selection context menu, editable-field context menu, or extension-icon right-click menu.</li><li><strong>Guided Page Picking:</strong> Choose <strong>Pick field or text</strong> to outline the exact hovered writing field, paragraph, or readable page element. Picked fields support corrections, while ordinary page text opens as a clearly labeled review-only result. <strong>Highlight text</strong> remains available for reviewing a smaller dragged selection.</li><li><strong>Read Aloud:</strong> Hear the current draft using browser and system voices to catch mistakes that are easy to overlook visually.</li><li><strong>English Dialects:</strong> Choose American, British, Australian, or Canadian English.</li><li><strong>Site Controls:</strong> Pause on selected sites, use an allowlist instead, or hide only the floating field badge.</li><li><strong>Best-Effort Username Protection:</strong> Skips explicit @handles, leading chat-name labels, and recognized rich-editor mention elements so usernames are less likely to be treated as spelling mistakes.</li><li><strong>Movable, Temporary Results:</strong> The suggestion panel tries to open above the affected word, can be dragged away from page controls, and closes shortly after a successful user-selected fix while keeping undo available.</li><li><strong>Compatible Rich Editors:</strong> Corrections use the editor's normal editing path and are verified after the website updates its state, preventing a visual-only change from being reported as successful.</li><li><strong>Accessible Support Links:</strong> Icon-labeled Ko-fi and donation links appear at the top and bottom of Settings, inside the suggestion panel, and directly in the extension-icon right-click menu.</li><li><strong>Faster Toolbar Controls:</strong> Compact Ko-fi and Donate buttons appear at the top of the toolbar popup. Automatic correction is a direct toggle, and Obvious or Expanded mode can be selected there without opening Settings or a confirmation dialog.</li><li><strong>Synchronized Quick Controls:</strong> The extension-icon menu keeps its automatic-correction and live-suggestion checkmarks synchronized with Settings.</li><li><strong>Clean Badge Lifecycle:</strong> Field and toolbar counts clear when focus leaves the checked field or a read-only selection review ends, preventing stale issue badges.</li><li><strong>Local Preferences:</strong> Personal dictionary, settings, and site rules remain in browser extension storage. Settings can be exported and imported.</li></ul>
<strong>Safety and Privacy</strong>
<ul><li>Writing is processed locally and is not uploaded for proofreading.</li><li>No account, analytics, advertising tracker, or remote proofreading API is included.</li><li>Recognized password, passcode, payment-card, security-code, one-time-code, social-security, and common code-editor fields are excluded.</li><li>Automatic correction does not press Send, submit forms, or replace a draft that changed while it was being checked.</li><li>Browsers prevent extensions from running on protected internal pages, extension stores, and some built-in viewers.</li></ul>
<strong>Permissions</strong>
<ul><li><strong>Storage:</strong> Saves proofreading preferences, personal dictionary words, and site rules locally.</li><li><strong>Context Menus:</strong> Adds user-invoked checking, toggle, site, settings, undo, and support commands.</li><li><strong>Host Access:</strong> Lets the extension provide its writing-field tools on webpages. Page text is not collected or transmitted.</li><li><strong>Active Tab:</strong> Lets toolbar and context-menu commands act on the page the user explicitly invokes them from.</li></ul>
<strong>Open-Source Credit</strong>

Spelling and grammar analysis is powered by Harper / harper.js 2.7.0, used under the Apache License 2.0. Harper runs locally and is not affiliated with or responsible for Aar318's Smart Proofreader. The complete Harper license and third-party notice are included with the extension.

Spelling candidates are additionally ranked with the bundled SymSpell English word-frequency and bigram-frequency files under the source repository's MIT license. The complete included-data attribution and license are packaged with the extension.

Harper: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/85e4938e41a1e177d2be27f6b8d107c915ac62a860784e51e9e0382a01aa049c/https%3A//writewithharper.com/" rel="nofollow">https://writewithharper.com/</a>
Source: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/48f30b5be72fec6afcc35181dade882537c50be0a429f9339bb0869a969dda40/https%3A//github.com/Automattic/harper" rel="nofollow">https://github.com/Automattic/harper</a>
Frequency data: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/52a3d56988e53abc90084673458969478b754642f1380228201cbc9b82f455f9/https%3A//github.com/wolfgarbe/SymSpell" rel="nofollow">https://github.com/wolfgarbe/SymSpell</a>

<strong>Support</strong>

Ko-fi: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/459e94d44c6802dfa0652117e82e7de10c84fc789678c39bb5d33fa6010ebcb5/https%3A//ko-fi.com/M4M81VBQPJ" rel="nofollow">https://ko-fi.com/M4M81VBQPJ</a>
Donate: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/05355501922176be3683d344f9a2360f1fb41f0c4529ca4b29dbda9888605a10/https%3A//streamelements.com/hor318/tip" rel="nofollow">https://streamelements.com/hor318/tip</a>

## Rankings

- #82,374 — Overall
- #241 — grammar

## Permissions and access

### Permissions

- `activeTab`
- `contextMenus`
- `storage`

### Host permissions

- `<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/aar318-s-smart-proofreader)