Language: Italiano (Italian)
Firefox Language Pack for Italiano (it) – Italian
367,827 users
Firefox Multi-Account Containers
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs. Cookies are separated by container, allowing you to use the web with multiple accounts and integrate Mozilla VPN for an extra layer of privacy.
367,556 users
Language: Español (CL) (Spanish, Chile)
Firefox Language Pack for Español (CL) (es-CL) – Spanish, Chile
366,288 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.
343,075 users
Web Threat Shield
Keeps you safe when browsing the web by identifying and blocking dangerous websites.
336,364 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!
325,159 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.
324,935 users
I don't care about cookies
Get rid of cookie warnings from almost all websites!
322,999 users
Firefox Translations
Translate websites in your browser, privately, without using the cloud. The functionality from this extension is now integrated into Firefox.
320,227 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
312,383 users
Simple Translate
Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.
309,742 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.
304,409 users
French spelling dictionary
Spelling dictionary for the French language.
298,465 users
Language: العربية (Arabic)
Firefox Language Pack for العربية (ar) – Arabic
295,840 users
Language: Nederlands (Dutch)
Firefox Language Pack for Nederlands (nl) – Dutch
295,582 users
Language: 日本語 (Japanese)
Firefox Language Pack for 日本語 (ja) – Japanese
294,825 users
Language: Português (PT) (Portuguese)
Firefox Language Pack for Português (PT) (pt-PT) – Portuguese
290,630 users
Norton Password Manager
Norton Password Manager. Free password security you can trust.
286,264 users
Reddit Enhancement Suite
Reddit Enhancement Suite (RES) is a suite of tools to enhance your Reddit browsing experience.
275,140 users
Language: Українська (Ukrainian)
Firefox Language Pack for Українська (uk) – Ukrainian
274,887 users
274,027 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.
264,556 users
Russian spellchecking dictionary
Russian spellchecking dictionary
260,564 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.
254,644 users
Language: Čeština (Czech)
Firefox Language Pack for Čeština (cs) – Czech
248,526 users