Most Popular Extensions

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Belgium eID Requires Restart

Use the Belgian electronic identity card (eID) in Firefox

Rated 3 out of 5 stars (92)
188,910 users

Password Exporter

This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Rated 4 out of 5 stars (351)
186,343 users

NoSquint Requires Restart

NoSquint is no longer maintained. :(

Rated 5 out of 5 stars (508)
183,295 users

BlockSite Requires Restart

BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.

Rated 3 out of 5 stars (540)
182,901 users

xThunder Requires Restart

Manage popular downloaders (Windows, Linux, Mac) and support special links of thunder,flashget,qqdl,ed2k,magnet,fs2you.

Rated 5 out of 5 stars (83)
182,246 users

Public Fox Requires Restart Featured

Block downloads, lock down bookmarks/addons/downloads with a password.

Rated 4 out of 5 stars (194)
181,832 users

Self-Destructing Cookies Featured

Fix the web. Gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.

Rated 4 out of 5 stars (519)
181,078 users

SQLite Manager Requires Restart

Manage any SQLite database on your computer.

Rated 5 out of 5 stars (55)
179,139 users

Blur

Protect your Passwords, Payments, and Privacy.

Rated 4 out of 5 stars (774)
171,145 users

IE Tab Requires Restart

IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...

Rated 4 out of 5 stars (1,201)
169,767 users

µBlock

NOTE: Users should be aware that this add-on represents an older fork. The original developer of uBlock is continuing to actively develop the newer fork uBlock Origin.

Rated 4 out of 5 stars (224)
168,181 users

All-in-One Sidebar Requires Restart

AiOS lets you open various windows as sidebar panels, and quickly switch between them. So it put an end to the window chaos! In addition to bookmarks and history it opens dialogues such as downloads, add-ons and more in the sidebar.

Rated 5 out of 5 stars (1,521)
168,066 users

Speed Dial [FVD] - New Tab Page, Sync... Requires Restart

FVD Speed Dial - Speed dial button, online synchronization, new tab start page, bookmark organization, custom backgrounds, custom dials, groups, mobile apps, most-visited dials.

Rated 5 out of 5 stars (2,061)
154,066 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.

Rated 4 out of 5 stars (236)
154,064 users

RightToClick Requires Restart

Stops javascript annoyances such as forbidden right click, forbidden text selection or disabled features like copy/save images from web-pages.

Rated 5 out of 5 stars (157)
148,549 users

Mozilla Archive Format, with MHT and Faithful Save Requires Restart Featured

— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!

Rated 4 out of 5 stars (312)
147,289 users

ReloadEvery Requires Restart

Reloads web pages every so many seconds or minutes. The function is accessible via the context menu (menu you get when you right click on a web page) or via tab context menu (right click on the tab)

Rated 4 out of 5 stars (712)
145,442 users

Quick Locale Switcher Requires Restart

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 3 out of 5 stars (88)
142,643 users

RESTClient, a debugger for RESTful web services. Requires Restart

Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.

Please follow the link ("View other versions") below To install version 2.0.1.

Rated 4 out of 5 stars (97)
139,366 users

DuckDuckGo Plus Featured

DuckDuckGo is the search engine that doesn't track you. This add-on makes DuckDuckGo your default search engine and includes some other useful features.

Rated 4 out of 5 stars (152)
137,625 users