Cost / License
- Free
- Open Source (MIT)
Platforms
- Google Chrome
- Mastodon
- Firefox



Browse 1,791 Mozilla Firefox Plugins, Add-ons and extension on AlternativeTo.



The ambient light player for your favorite web browser ! Ambivid is a lightweight plugin that creates light effects around Youtube's HTML5 video player that correspond to the video content, resulting in a more immerse experience.



Access all your favorite dictionaries and other lookup services in one place.
Firefox and Chrome extension are available to easily select and lookup any text in web pages.
A beautiful, customizable New Tab page for Firefox, Chrome, Edge, and other Chromium-based browsers.




Let's you block any set of websites on a schedule. Let's you block independently both opening new tabs and using old tabs. Let's you set up independent different times for each day. Dark mode included.



This browser extension enhances your web.snapchat.com experience by adding several essential privacy features.


Manage your Capital One® credit cards, Capital One 360?, and your Capital One® Bank accounts—securely and conveniently with our iPhone® app. View balances and recent activity, deposit checks, pay your bill(s) and schedule payments, move money, find branches/ATMs...



Download Status Bar manages every aspect of your downloads (Launch, Show, Scan, Send To, Rename, Checksum, Pause, Resume, Cancel, Clean, Delete), generates Statistics from your Download actions, keeps the History of your previous session downloads and much more.




All-in-One Sidebar (AiOS) is a sidebar control, inspired by Opera . Click on the left edge of your browser window to open the sidebar and get easy access to all your panels.




Coinhive Blocker is simple but powerful add-on for Firefox and Google Chrome, which blocks crypto-currency mining scripts from Coinhive.
PaperSpan is an easy to use, free app to save web pages for reading later. Save pages from computer or phone's browser, and open them from either.




My TON wallet. Free TON blockchain wallet allows you creating new accounts, make backups, restore them, send transactions and much more. You will be able to transfer CRYSTALS between accounts quickly and securely. Open source code on Github.




This add-on automatically removes all garbage like "utm_source=*" from URLs. These fields are provided for the Google Analytics and they are not a necessity.


Firefox extension to automatically open websites in a container. Map multiple domains and subdomain to a container with simple CSV based config. Once mapped, this extension will always open the site in a container. This behavior is disabled in private mode.








Sage-Like is a simple, sidebar based feed reader (Atom, RSS and RDF). Like its add-on predecessors, Sage by Peter Andrews and the Sage++ by Higmmer, it's lightweight and fast.




Provides tab groups / panorama functionality using the tab hide api. Manage tab groups in a compact, tiled groups view.

Online library of books, academic texts and tools, trusted by students worldwide. Get access to thousands of eBooks online.




Selenium IDE is a browser add-on that records clicks, typing, and other actions to make a test, which you can play back in the browser.

OneCart is an universal shoping cart. You can easily add any product from any online market to your cart and keep them in one place, you will always have-up-to date prices and possibility to find similar products in other markets.




Badger Wallet is a Bitcoin Cash (BCH) and Simple Token (SLP) wallet designed for everyone.




This extension will keep track of the anime you're watching and synchronize your MyAnimeList or Kitsu accordingly.

AI Writer and Assistant. Supports Search Engines/Emails/Social Media/YouTube Summary and more powered by Open-AI Chat-GPT.




Filters out annoying ads and scams while blocking trackers that spy on you. Download free for Chrome, Edge and Firefox browsers.



