Cost / License
- Freemium
- Proprietary
Platforms
- Windows
- Microsoft Edge
- Google Chrome
- Mozilla Firefox

Browse 1,771 Mozilla Firefox Plugins, Add-ons and extension on AlternativeTo.

Coinhive Blocker is simple but powerful add-on for Firefox and Google Chrome, which blocks crypto-currency mining scripts from Coinhive.




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.




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.

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.




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.




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.




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.




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




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

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.




A Firefox extension for creating a dashboard with RSS/ATOM feeds. Feeds can be sorted by category. The extension can discover feeds in open tabs.




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.




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.




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.

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




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


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.

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