Korektor Spellchecker

Name: Korektor Spellchecker
Rating: 3 (2 reviews)
Author: Milan Straka

By: Milan Straka Add-on

Allow using Korektor service on editable controls.

Overview

Firefox Add-ons Store

Daily users

46 ▲ 1

Data as of 2026-08-01

Rating:

3.00

(2)

Version:

2.0.0

Last updated: 2026-07-22

Features & Capabilities

Korektor Spellchecker extension allows using Korektor service (spellchecker and occassional grammarchecker developed at Institute of Formal and Applied Linguistics, Charles University in Prague) on any editable input fields of web pages.

The extension allows either directly correcting the content, or showing a dialog with suggested corrections. Note that the dialog with suggestions is injected directly into the original page, so there can be various problems on untested sites. However, the extension seem to work fine on many sites.

Although the sources of Korektor service and this extension are available under BSD-3-Clause license, please respect the CC BY-SA-NC licence of the spellchecking models.

Korekor service is described at https://lindat.mff.cuni.cz/services/korektor/ , the Korektor itself is available from http://ufal.mff.cuni.cz/korektor .

User Growth & Download Statistics

Add-on

By:

Daily users:

Rating:

Version:

2.0.0 Last updated: 2026-07-22

Version code:

6369394

Creation date:

2015-08-08

Risk:

Permissions:

Host permissions:

https://lindat.mff.cuni.cz/

Size:

38.77KB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-08-01

Compare stats and ranking:

Ranking

# 16,212 ▲ 129

Other rankings

#34 in ai spelling checker keyword 65 ▲ 1#34 in spelling checker keyword 46 ▲ 1#37 in ai spell checker keyword 75 ▲ 1#37 in spell checker keyword 39 ▲ 1#183 in service keyword 42 ▲ 2

Other platforms

Korektor Spellchecker (v2.0.0)

128 1.00

(2)

For Developers

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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:

Milan Straka

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/korektor-spellchecker/

Permission Change History

2026-07-23: Version 1.1.1resigned1 → 2.0.0

Add Host permissions: https://lindat.mff.cuni.cz/

Add Permissions: scripting

Remove Permissions: https://lindat.mff.cuni.cz/

Is Korektor Spellchecker 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.

Korektor Spellchecker requires very minimum permissions.

Risk impact analysis details

Low Request access to the following domains: cuni.cz

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.

Korektor Spellchecker may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

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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