Cost / License
- Free
- Open Source (GPL-3.0)
Application type
Platforms
- Mac
- Windows
- Linux
- Google Chrome
- Mozilla Firefox
- Safari

Browse 1,830 Mozilla Firefox Plugins, Add-ons and extension on AlternativeTo including popular Mozilla Firefox options.

Be able to watch any sub-only vod on Twitch, integrated in the website and support every twitch features.


This add-on protects you from sites that automatically play loud/annoying sounds by muting all sites that aren't specified in a whitelist.

heylogin is the first password manager with full hardware-based end-to-end encryption. 2-factor secure by default, developed and hosted in Germany.




Search engine that fights climate change. 60% of revenue each month goes to climate change charities involved in animal welfare, reforestation, ocean conservation, and climate action.




Browser extension that blocks newsletter pop-ups, Chat boxes, "Install our app" toolbars, "Allow notifications" pop-ups, Let us know your location" pop-ups, Survey and opinion pop-ups, Sticky video boxes in the corner and more.





A Chrome and Firefox browser extension that enhances the Steam storefront with all kinds of extra information including price comparisons to other online retailers and the games historically lowest price.




Image Search Options provides a set of highly customizable reverse image search context menu options.




Popup Blocker (strict) is a lightweight extension to prevent websites from opening popups. The extension pauses all sort of window opening requests for user attention. You can either accept or deny a request. Multiple unique requests are shown in an array.

Dynamically load stylesheets in Firefox from plaintext files in your profile.
superUserContent is a simple Firefox plugin that creates a new directory in your profile's chrome directory called userContent.css.d. You can use this directory as a runtime path for css styleshee.

In a similar style to the old pre-WebExtensions CookieMonster plugin, CookieMaster allows you to control which sites are allowed to set cookies, focusing mainly on first party cookies.



This extension allows watching sensitive media on X (formely known as Twitter) for all accounts without providing a selfie or a government ID.

Shareaholic is the simplest way to share, spread, and save interesting webpages via your social networks, email, blogs, IM, and more.


mSecure keeps your data safe because it uses the ultra-secure 256bit blowfish encryption to protect personal information such as account numbers, usernames, passwords and more. mSecure is more than a password manager in that it provides 17 popular personal information templates...



SearchLock is a privacy-friendly search engine that prevents the tracking of your personal searches by the big search engine companies and others.

Pincone is a simple and well-designed bookmarking tool for websites, newsletters, feeds, articles, and much more 💛.




Displays new emails, sender's contact photo, and notifications, and allows the user to listen, read or delete emails without opening Gmail! Supports multiple accounts plus and provides many other tools.



On an internet dominated by ads and corporate-run websites, Indie Wiki Buddy is a browser extension that helps you easily find and support independent wikis.




A browser extension that progressively immerses you in a language. Using Google Translate we translate frequent words in sites you read to a language you want to learn! This will not teach you a language but instead hopefully expand your vocab.

A cloud storage where you can invite multiple users to do work together. you can protect every file that you have with an encryption method.



