

Browse 1,867 Mozilla Firefox Plugins, Add-ons and extension on AlternativeTo including popular Mozilla Firefox options.


Local CDN extension is a fork for Decentraleyes project, bringing local redirection for well-known libraries. After the extension is installed, when a known library is requested by a webpage, the extension redirects this request to a local...


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.








Yomitan turns your web browser into a tool for building language literacy by helping you read texts that would otherwise be too difficult to tackle in a variety of supported languages.




Download files using curl or wget. This addon generates curl/wget commands that emulate the request as though it's coming from your browser allowing you to download protected files directly to a separate machine (e.g. server).


VimFx is a Mozilla Firefox extension which introduces Vim-style keyboard shortcuts for browsing and navigation, significantly reducing the use of mouse, and allowing your hands to rest on the home row.


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


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

Sage is a lightweight RSS and Atom feed aggregator extension for Mozilla Firefox. It's got a lot of what you need and not much of what you don't.

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




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.








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.




Text to speech extension for a browser. Automatic text detection (can speak without necessary selection), adjustable voice speed, playlist.




ScareMail is a web browser extension that makes email “scary” in order to disrupt NSA surveillance. Extending Google’s Gmail, the work adds to every new email’s signature an algorithmically generated narrative containing a collection of probable NSA search terms.

Dislike Reddit's redesign? Old Reddit Redirect will ensure that you always load the old (old.reddit.com) design instead.

Prevent tabs opened by a hyperlink from hijacking the previous tab by adding the rel=noopener attribute to all hyperlinks (excluding same-domain hyperlinks).

Automatically resumes YouTube videos from where you played them last. Without this extension, for example, when you click through YouTube videos, back and forth, they always start from the beginning. No more.


Automatically reloads matching tabs when selected local files change (useful for web developers).



Show the likes and dislikes bar over every video thumbnail on YouTube so that you can know its rating before watching it.




Save, organize and tell stories with content from around the web. Save articles, videos, social media posts, podcasts, maps, online documents as well as your own images, notes and PDF's into visual collections.



