WhatRuns
Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.
9,194 users
Html Validator
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon For Firefox 56, use 0.974 (see all versions below). For Firefox 57, see Web Extensions.
9,188 users
Easy Manuals Finder & Custom Web Search
Add the Easy Manuals Finder & Custom Web Search extension to access user manuals by clicking the favicon on the toolbar and get web search results powered by Yahoo®.
9,171 users
EditThisCookie
EditThisCookie is a cookie manager.
9,152 users
Activate Reader View
This add-on adds a button to the toolbar. Clicking on it activates the Reader View even if the icon in the address bar is not present.
9,143 users
Linguist - web pages translator
Translate web pages, highlighted text, Netflix subtitles, private messages, speak text, and save important translations to your personal dictionary to learn words in 130 languages.
9,134 users
Private Bookmarks
Enables a password-protected bookmark folder.
9,127 users
Instant Gaming
Browse the web for your favorite games and always know if they are available at Instant-Gaming.com !
9,124 users
FantasyPros: Win your Fantasy League
Get expert advice for your fantasy team from any website
9,122 users
Google Page Translate
Adds a toolbar button to open Google Page Translate for the current tab.
9,109 users
Пульс
Новые визуальные закладки Mail.Ru
9,102 users
Highlighter + Notes
Add Highlights and Notes to a Web Page
8,969 users
Avast SecureLine VPN
Control your Avast SecureLine VPN from the comfort of your browser. Easily turn your VPN on and off, or change your server location, with our simple but powerful extension. All you need is Avast SecureLine VPN with a valid license.
8,946 users
8,923 users
Progressive Web Apps for Firefox
A tool to install, manage and use Progressive Web Apps (PWAs) in Mozilla Firefox
8,904 users
8,857 users
8,855 users
Bookmarks clean up
Find and remove duplicated bookmarks manually and in batches, get rid of broken bookmark links and empty folders.
8,824 users
View PDF
View PDF - Click The Extension Icon For 14 PDF Tools & Access Yahoo Web Search.
8,813 users
Session Sync
Save sessions as bookmarks and access them across devices. Advanced Session Manager: edit, save, change, restore. It can also be your best Bookmark Manager
8,772 users
Privacy | Protect Your Payments
Privacy's Firefox add-on allows you to generate a new virtual card number with 1-click on any checkout page. Keep your payment info safe from data breaches, shady merchants, and sneaky subscription billing.
8,765 users
Shortkeys (Custom Keyboard Shortcuts) for Firefox
Easily customizable custom keyboard shortcuts for Firefox. To configure this addon go to Addons (ctrl+shift+a) ->Shortkeys ->Options. Report issues here (please specify that the issue is found in Firefox): https://github.com/mikecrittenden/shortkeys
8,738 users
8,725 users
8,715 users
Hide My IP Free
Hide Your IP Address and Unblock Websites for Free with the Hide My IP proxy and VPN IP network. Thousands of IPs around the world to choose from. Access your favorite streaming sites by changing your IP location. No ads or limitations.
8,692 users