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Find tools to improve your workflow - right within Firefox.

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Duden-Mentor-Textprüfung

Erkennt Fehler in Rechtschreibung, Grammatik und Zeichensetzung. Kinderleichte Bedienung, viele weitere Funktionen verfügbar!

Half Bold

A tool to help people with ADHD improve their reading focus and comprehension.

Quick Accept-Language Switcher

Provides a quick way of changing the HTTP Accept-Language header so you can view and test websites with a different locale.

YouTube™ dual subtitles

Automatically switch to local language, bilingual subtitles, subtitle download, subtitle dubbing, custom subtitle style. Default subtitles: Set the translation language.

No Gender

Entfernt diverse Arten des "Gendern" auf Webseiten.

Circle reader

The best free reading assistant (reader mode) that enhances the web page reading experience. Ads are too distracting, the colors are too ugly, the fonts are too small to see clearly, the typography is too messy to find the text, does it really need

LuLu Translate

LuLu Translate, the world-leading cross-platform translation software, supports translation by selecting words.

Perapera Chinese Popup Dictionary

Put your mouse over any Chinese words on a webpage and it gives you the pronunciation and definition. Simple as that! As of version 2.1 PeraPera Chinese now supports Cantonese!

Selectext: Copy Text from Videos

Copy text directly from videos on Youtube and any site

TransOver

Hover, click or select to translate (with text-to-speech). Translator.

AI Subtitles & Immersive Translate - Trancy

Trancy provides bilingual subtitle for platforms like YouTube, Netflix, Disney+... as well as AI translator for websites.

AI Anywhere for ChatGPT

ChatGPT enhancer - adds context menu, keyboard shortcuts, history and more!

Override Text Encoding

Manually set the charset (character encoding) for a webpage, to fix encoding errors and garbage characters on websites. A replacement for the former View -> Text Encoding menu.

Open Subtitles

Add subtitles to any HTML5 video sites such as Youtube, Netflix, Amazon Prime Video, Disney+, HBO Max and other stream sites.

Euskalbar

Basque dictionaries and other tools (corpora, spellcheckers, search engines...). Euskalbar is a Firefox toolbar that helps translating words from Basque to other languages and from other languages to Basque.

Yandex Translation

Yandex Translation is free and reliable tool provides accurate translations for over 90 languages.

Immersive Translate Ultra

Web bilingual translation, completely free to use, supports Deepl/Google/Bing/Tencent/Youdao, etc.