WhatRuns
Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.
9,146 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.
9,145 users
FantasyPros: Win your Fantasy League
Get expert advice for your fantasy team from any website
9,129 users
EditThisCookie
EditThisCookie is a cookie manager.
9,116 users
Instant Gaming
Browse the web for your favorite games and always know if they are available at Instant-Gaming.com !
9,110 users
Private Bookmarks
Enables a password-protected bookmark folder.
9,099 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.
9,099 users
Google Page Translate
Adds a toolbar button to open Google Page Translate for the current tab.
9,078 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.
9,076 users
Пульс
Новые визуальные закладки Mail.Ru
9,047 users
Highlighter + Notes
Add Highlights and Notes to a Web Page
8,931 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®.
8,910 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.
8,906 users
Progressive Web Apps for Firefox
A tool to install, manage and use Progressive Web Apps (PWAs) in Mozilla Firefox
8,855 users
8,820 users
8,814 users
8,804 users
Bookmarks clean up
Find and remove duplicated bookmarks manually and in batches, get rid of broken bookmark links and empty folders.
8,801 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.
8,759 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
8,739 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
8,711 users
8,686 users
Video Downloader for Reddit - Redditsave
A powerful reddit video downloader with sound powered by redditsave.com
8,660 users
Adaware AdBlock
By blocking annoying ads and nosy trackers, Adaware AdBlock nearly doubles your browsing speed! And with the most robust antivirus-level cloud-scanning technology of any ad blocker on the market, you’ll be safe from the latest cyber-threats.
8,653 users
8,646 users