Language: Polski (Polish)
Firefox Language Pack for Polski (pl) – Polish
364,490 users
Language: Italiano (Italian)
Firefox Language Pack for Italiano (it) – Italian
362,566 users
Language: 简体中文 (Simplified Chinese)
Firefox Language Pack for 简体中文 (zh-CN) – Simplified Chinese
357,479 users
Grammar and Spell Checker - LanguageTool
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.
344,610 users
Web Threat Shield
Keeps you safe when browsing the web by identifying and blocking dangerous websites.
337,997 users
1Password: Password Manager
The best way to experience 1Password in your browser. Easily sign in to sites, generate passwords, and store secure information, including logins, credit cards, notes, and more.
331,515 users
I don't care about cookies
Get rid of cookie warnings from almost all websites!
317,439 users
Firefox Translations
Translate websites in your browser, privately, without using the cloud. The functionality from this extension is now integrated into Firefox.
316,773 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
316,382 users
Ecosia — The search engine that plants trees 🌱
This extension adds Ecosia.org as the default search engine to your browser — it’s completely free!
313,863 users
Simple Translate
Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.
313,280 users
Language: العربية (Arabic)
Firefox Language Pack for العربية (ar) – Arabic
309,229 users
NoScript Security Suite
The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.
303,227 users
Language: Nederlands (Dutch)
Firefox Language Pack for Nederlands (nl) – Dutch
288,074 users
French spelling dictionary
Spelling dictionary for the French language.
287,260 users
Language: 日本語 (Japanese)
Firefox Language Pack for 日本語 (ja) – Japanese
286,856 users
Language: Português (PT) (Portuguese)
Firefox Language Pack for Português (PT) (pt-PT) – Portuguese
283,870 users
Norton Password Manager
Norton Password Manager. Free password security you can trust.
280,569 users
Reddit Enhancement Suite
Reddit Enhancement Suite (RES) is a suite of tools to enhance your Reddit browsing experience.
277,639 users
Language: Українська (Ukrainian)
Firefox Language Pack for Українська (uk) – Ukrainian
269,761 users
269,004 users
Russian spellchecking dictionary
Russian spellchecking dictionary
268,203 users
Decentraleyes
Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
264,622 users
Zoom Extension
Recommended, support FireFox 45+. The Zoom Firefox Extension allows participants to schedule Zoom cloud meetings directly from Google Calendar. you can start an instant meeting or schedule a future meeting via a button.
256,880 users
Cookie AutoDelete
Control your cookies! This WebExtension is inspired by Self Destructing Cookies. When a tab closes, any cookies not being used are automatically deleted. Keep the ones you trust (forever/until restart) while deleting the rest. Containers Supported
243,652 users