Firefox extensions can be installed from addons.mozilla.org and managed at
Chrome extensions can be installed from the Chrome Web Store and managed at
To simplify maintenance this article does not link store pages or AUR packages of extensions. Readers are advised to obtain extensions through the linked official websites if no package is available.
- uBlock Origin — A lightweight, efficient blocker which is easy on memory and CPU. It comes with several filter lists ready to use out-of-the-box (including EasyList, Peter Lowe's, several malware filter lists). The lead developer of uBlock forked the project and created uBlock Origin. As of July 2015, most of the development is being done on uBlock Origin and the codebases are deviating substantially.
- Adblock Plus — Was a popular extension to block ads. Now that it is not blocking some ads on purpose , it may be a better idea to use a different blocker like uBlock Origin.
- ScriptSafe — Gives users control of the web and more secure browsing while emphasizing simplicity and intuitiveness. Due to the nature of this extension, this will break most sites! It is designed to learn over time with sites that you allow.
- Cookie AutoDelete — Deletes cookies as soon as the tab closes. Supports automatic and manual cookie cleaning modes. (Support for clearing LocalStorage was added in version 2.1, but only for Firefox versions 58+. The same release added support for first party isolation, but only for Firefox versions 59+).
- Vanilla Cookie Manager — A cookie whitelist manager that automatically removes unwanted cookies. Cookies can be used for authentication, storing your site preferences or anything else that can be saved as text data. Unfortunately they can also be used to track you. You could turn off cookies completely or just shut off third-party cookies. But that would also keep out useful cookies that many web apps rely upon to work (like Google Mail or Calendar). With Vanilla you can select which cookies you want to keep on a whitelist. All unwanted cookies are deleted automatically (or manually if you prefer).
Automatic tracker blockers
- Privacy Badger — Monitors third-party trackers loaded with web content. It blocks trackers once they appear on different sites. It does not block advertisements in the first place, but since a lot of ads are served based on tracking information these are blocked as well. For more information on the mechanism, see its FAQ.
- Disconnect — Aims to stop 2,000 third-party sites from tracking the user. It encrypts data sent to popular sites and claims to loads web pages 27 percent faster. Disconnect shows its users, in real time, how many tracking attempts from Google, Twitter, Facebook, and more are stopped. It categorizes tracking attempts into advertising, analytical, social, and content, which makes it easy to monitor how one is being tracked. Disconnect can also stop side-jacking, which utilizes stolen cookies to steal personal data. It is easy to use and well supported. Firefox gained a feature based on the Disconnect list, see Firefox/Privacy#Tracking protection.
- AdNauseam — A lightweight browser extension that blends software tool and artware intervention to fight back against tracking by advertising networks. AdNauseam works like an ad-blocker (it is built atop uBlock-Origin) to silently simulate clicks on each blocked ad, confusing trackers as to one's real interests.
- TrackMeNot — Periodically issues randomized search-queries to popular search engines and helps you hide your real ones in a cloud of 'ghost' queries.
- HTTPS Everywhere — Encrypts your communication with a website. It forces a connection over HTTPS instead of HTTP wherever possible. HTTPS Everywhere will be automatically configured and enabled upon restarting Firefox. For information on how to set up your own rules for different websites please visit the official website. HTTPS Everywhere does not magically enable HTTPS for every site on the internet. The site needs to support HTTPS and HTTPS Everywhere should have a ruleset configured for that site.
- Decentraleyes — Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
- CanvasBlocker — Blocks or fakes the JS-API for modifying <canvas> to prevent Canvas-Fingerprinting. Firefox has a built-in anti-fingerprinting feature that can be enabled by setting
- Privacy Settings — Provides a toolbar panel for easily altering the browser's built-in privacy settings.
- Stylus — User style sheets manager, fork of defunct Stylish.
- Violentmonkey — Open source userscript manager.
- Tampermonkey — Proprietary userscript manager.
- Dark Reader — Inverts brightness of web pages and aims to reduce eyestrain while browsing the web.
- Toggle Website Colors — Replaces colors with user selected ones.
There are various extensions providing vi-style keyboard shortcuts.
- Vimium — Allows mouse-less browsing, has an experimental Firefox version.
- Saka Key — Allows mouse-less browsing, focused on accessibility.
- Tridactyl — Replace Firefox's control mechanism with one modelled on Vim.
- wasavi — Can transform textareas into Vi editors.
Edit text with external text editor
Extensions to edit <textarea>s with native text editors:
- Textern — Add-on for editing text in your favorite external editor, requires Python script, available as AUR.
- withExEditor — View source, selection, and edit text with the external editor, requires Node.js.
- GhostText — Use your text editor to write in your browser. Everything you type in the editor will be instantly updated in the browser (and vice versa). Has plugins for Vim, Emacs, Neovim, Visual Studio Code and Atom.