Mobile View Switcher
Switch to mobile view with one click via toolbar button.
12,688 users
Grammalecte [fr]
French grammar checker. Included: conjugation tool, lexicographer, text formatter and spelling dictionaries.
12,684 users
IP Address and Domain Information
The Ultimate online investigation tool! See detailed information about every IP Address, Domain Name and Provider.
12,682 users
Sticky Password manager & safe
Never forget a password again. Sticky Password manager saves them securely and types them for you as you browse. Automatically!
12,679 users
Header Editor
Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests
12,634 users
CSGO Trader - Steam Trading Enhancer
Extension to help with CS:GO trading, trade-lock countdown, in-browser inspect, doppler phases, prices, float values, etc
12,585 users
Speed Dial
Speed Dial allows you to add and manage bookmarks in the New Tab page and gives you an optional search experience.
12,565 users
Swisscows
Adds Swisscows as the default search engine in your browser.
12,553 users
Steamcito: Steam con impuestos de Argentina 2024
Muestra todos los productos de la tienda de Steam con todos los impuestos de Argentina incluidos
12,530 users
Yandex Evolution
Popular Russian search engine by Yandex (Яndex, Яндекс)
12,503 users
Simple YouTube to MP3/MP4 Converter and Downloader
Download youtube videos as mp3/mp4/ogg/webm fast and easy! Adding mirrors everyday to decrease any downtime! We monitor comments and work to fix any problems as soon as possible!
12,482 users
SimilarWeb - Website Traffic Sources and Ranking
Get in-depth traffic and engagement stats for any website with a single click. See how popular a website is, its geography and traffic sources, .
12,467 users
Slickdeals
Always get the best price: find the best deals from Slickdeals and automatically apply coupons!
12,459 users
Downie Extension
Allows to send links to Downie directly from Firefox.
12,371 users
PKCS11 module loader
Configures Firefox to use PKCS11 for authentication
12,305 users
Open in PDF Viewer
Easily open desired links in PDF viewer
12,241 users
Romanian spellchecking dictionary
Romanian spellchecking dictionary for Firefox.
12,193 users
Speed Dial 2 New tab page
Make your new tab page a true home for your work and free time. Speed Dial 2 is a new tab page extension with easy access to your favorite websites.
12,105 users
Google™ Translator
a handy multi-language translator built on top of Google translate.
12,094 users
Karma | Online shopping, but better
Shop Smarter: Compare Prices, Get Coupons, Price alerts & Earn Cashback!
12,066 users
YouTube™ to MP3
Convert & download YouTube videos to MP3 with just one click!
12,040 users
Tile Tabs WE
Take tabs from parent windows and arrange them in layouts of tiled sub-windows, using the toolbar button, context menu or keyboard shortcuts. Makes it easy to browse, compare or monitor multiple pages. Synchronize scroll. Save and re-open layouts.
12,021 users
Breez ClickOnce
Breez ClickOnce enables ClickOnce support in Mozilla Firefox. It is required to be able to launch any Windows Forms or Windows Presentation Foundation application that is based on Microsoft's ClickOnce technology.
11,933 users
Url to QrCode
an add-on for convert URLs to Qr Code.
11,881 users
Flag Cookies
A cookie, and browser storage manager with cow powers!
11,863 users