Cost / License
- Free
- Open Source (MIT)
Platforms
- YouTube
- Firefox

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

Ninja Download Manager is an Internet download manager and accelerator that dramatically increases download speed and allows you to resume and restart stopped / broken downloads.



CSFloat provides the most advanced marketplace and trading tools that power millions of skin sales and index billions of skins. Buy and sell CS2 skins with unparalleled ease and security.




F.B. Purity is a browser extension / add-on that lets you clean up and customize Facebook. It filters out the junk you don't want to see, leaving behind the stories and page elements you do wish to see, and is customizable to your taste.

An extension to control requests. Provides front-end for Firefox webRequest.onBeforeRequest API for request management.



CIRA Canadian Shield protects you from online threats such as malicious domains, phishing websites and helps to keep your personal data private. It also provides DNS privacy by keeping your DNS requests in Canada.




This extension doesn't use artificial intelligence, you decide what to block. Hide "trolls" and other unwanted commenters on all YouTube watch pages.

A cross browser extension to help people download videos from websites, including, HLS, DASH, Live Stream.




PackPack is an AI-driven bookmark management tool tailored for saving content from online resources like news and social media. It utilizes AI to clean and save content. With PackPack, transform the way you manage bookmarks and handle your collections more intelligently.




OpenRPA automates repetitive tasks performed by humans to cut costs, eliminate keying errors, speed up processes, and easily link applications together. These tasks can be converted into a business process and then automated.


Swift Selection Search (SSS) is an add-on for quickly searching for selected text in a page using your favorite search engines.




This add-on changes Firefox's theme automatically while you browse the web, matching the appearance of the current website you are viewing — just like how macOS Safari tints its tab bar.




This extension will block access to websites of your choosing. A master password controls all customization options, as well as access to any blocked site. It’s also possible to redirect navigation from one specific website to another.



Browser extension for bidirectional bookmark sync with GitHub. Per-file storage (one JSON file per bookmark), three-way merge, auto-sync, multiple profiles. Works on Chrome and Firefox. Add bookmarks via Git, CLI, or GitHub Actions. No server — syncs directly via the GitHub API.




Lightweight browser extension for direct YouTube video and Shorts downloads in up to 8K or instant 320 kbps MP3 conversion, with no ads or redirects.












Disguising itself as regular traffic, this service hides your IP, encrypts data, supports 10 devices at once, and offers global server locations.




c0x0.com let you create anonymous, random and permament e-mail aliases that protect your privacy. Aliases can be attached to any existing e-mail address you already own. Support for custom domains and developer API. Create free account.




Open-source extension for downloading video, audio, and streaming media, compatible with Firefox, Chrome, and more.




Productivity app. Save information like a sticky notes. You can create notes with images, videos or whatever you want. Save pages to read later or capture any web content with the chrome or firefox extension. Share boards with your friends. Create public boards.



CookieBlock is a browser extension that allows you to automatically remove cookies that do not respect your privacy. Through the use of advanced machine-learning technology, it categorizes cookies into four distinct purposes.






Have you ever wanted to send an article or long conversation over IM or post to Twitter, only to have it be over the character limit? That's what TinyPaste is for. The Firefox addon lets you right click on any selected text to save it; you can also enter text into the...