Firefox add-on with keyword - spell checker

With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.

This is a real time spell checker for Hindi, supported on Firefox, Thunderbird, and Seamonkey.

A spellchecker for Oxford English.

This dictionary is no longer maintained. Use this dictionary instead.

Get desktop notifications, read, listen or delete emails without opening Gmail or Inbox by Gmail & easily manage multiple accounts.

Arabic spell-checking dictionary for Firefox 3 and Thunderbird 3 from Ayaspell.

Telugu Spell Checker

Shows the float value, paint seed, and screenshots of Counter-Strike (CS:GO & CS2) items on the Steam Market or Inventories

Improve your writing with Grammarly's assistance. Get spell check, grammar check, and punctuation check in one tool. Real-time suggestions for improving tone and clarity help ensure your writing makes the impression you want.

Greek spellchecking dictionary Mozilla (Firefox- Thunderbird- Seamonkey)

Kannada Spell Checker

This plugin allows you to check any file you are about to download, any page you are about to visit with online version of Dr.Web anti-virus.

The easiest and simplest way to check for PlugIn-Updates. Never forget to install the newest safe versions.

Finnish spellchecker dictionary for Firefox, Thunderbird and SeaMonkey .

Hebrew spell-checking dictionary for Firefox and Thunderbird. Generated from data of the HSpell project version 1.4, and distributed freely under the AGPLv3.

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Gujarati Spell Checker

Azerbaijani SpellChecker for Mozilla Firefox. Developed with love by Mozilla Azerbaijan.

Checks for compliance with the contrast levels of foreground and background colors combination based on the requirements of WCAG 2.2

Explore the web and lookup articles you find on Ground News

Check the quality of your proxies' IPs in bulk.

Very lightweight Firefox 57+ (WebExtension) Compatibile Gmail checker Add-On. Onclick: open GMail. English version.

A SEO tool to find broken (404) and redirected (301, 307, 308) links in all frames

Your Xhosa spell checker allows you to check spelling in Xhosa and avoided typing errors in Firefox and Thunderbird. Now you don't need to see your Xhosa text underlined in red, allowing you to be proudly South African.

Simple extension letting you uncheck all checkboxes on a page.