Language: Português (BR)
Firefox Language Pack for Português (BR) (pt-BR) – Brazilian Portuguese
543,621 users
LastPass Password Manager
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
518,701 users
Malwarebytes Browser Guard
The fastest and safest web browsing experience. Secure your privacy by blocking trackers, blocking ads, and blocking malicious content.
497,552 users
469,084 users
Browsec VPN - Free VPN for Firefox
Unblock geographically restricted content and protect your IP with Browsec’s add-on. With this Firefox VPN, you can stay anonymous for an unlimited time! Use free remote servers to hide your location and access any content you want.
468,766 users
MetaMask
Ethereum Browser Extension
455,036 users
Language: Español (MX) (Spanish, Mexico)
Firefox Language Pack for Español (MX) (es-MX) – Spanish, Mexico
443,024 users
BetterTTV
Enhances Twitch and YouTube with new features, emotes, and more.
439,511 users
Kaspersky Protection 2021
Your protection on the Internet with extension from Kaspersky Lab
431,537 users
SaveFrom.net helper all-in-1 / youtube downloader
SaveFrom.net helper will enable you to download files from YouTube.com, FaceBook.com, Vimeo.com, Daylimotion.com, VK.com, Odnoklassnoki.ru, Soundcloud.com and more than 40 other just in one click.
414,913 users
411,259 users
Language: Polski (Polish)
Firefox Language Pack for Polski (pl) – Polish
371,805 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.
365,152 users
English United States Dictionary
English United States (en-US) Dictionary as shipped with Firefox 115 ESR.
360,006 users
Language: 简体中文 (Simplified Chinese)
Firefox Language Pack for 简体中文 (zh-CN) – Simplified Chinese
356,236 users
Language: Español (AR) (Spanish, Argentina)
Firefox Language Pack for Español (AR) (es-AR) – Spanish, Argentina
348,604 users
Language: Italiano (Italian)
Firefox Language Pack for Italiano (it) – Italian
346,227 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.
322,628 users
Language: Español (CL) (Spanish, Chile)
Firefox Language Pack for Español (CL) (es-CL) – Spanish, Chile
319,468 users
Web Threat Shield
Keeps you safe when browsing the web by identifying and blocking dangerous websites.
312,619 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!
307,905 users
I don't care about cookies
Get rid of cookie warnings from almost all websites!
305,922 users
Firefox Translations
Translate websites in your browser, privately, without using the cloud. The functionality from this extension is now integrated into Firefox.
305,583 users
French spelling dictionary
Spelling dictionary for the French language.
294,222 users
Language: 日本語 (Japanese)
Firefox Language Pack for 日本語 (ja) – Japanese
284,724 users