A browser addon that automatically monitors all passwords used and alerts you if it has been included in any data breaches.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Mac
- Windows
- Linux
- Android
- Firefox Developer Edition
- Firefox
Browse 1,763 Mozilla Firefox Plugins, Add-ons and extension on AlternativeTo.
A browser addon that automatically monitors all passwords used and alerts you if it has been included in any data breaches.
The extension generates a document-map or index of any web document structured with headings and/or with sections in HTML 5. It shows the headings structure, the errors in the structure (ie. incorrect levels), and it works as HTML5 Outliner too.


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




This addon provides a button to restore the last closed tab. A list of last closed tabs is available in the button context menu. This way you can pick an individual tab in history to restore it.

WebExtension allowing you to choose the default bookmark location folder and quickly bookmark pages via a dedicated icon. - teddy-gustiaux/default-bookmark-folder

Smoothwheel is an addon for Firefox, Thunderbird and SeaMonkey, which scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled). It works on all platforms supported by these applications.


Our extension adds anonymous, IRC-style chat to every domain on the Internet. We decentralize social media across a web increasingly dominated by a few unscrupulous companies. We don't sell your data, and we don't advertise.




ICS Converter is kind of the utility which let you convert ICS files to required file format without any kind of predicament. With Turgs ICS Converter software you can convert the unlimited number of iCalendar with all types of attachments.

Toolbar button to close the current tab. Works on the newest version of Firefox.
Block Site is a browser addon to help you block desired websites. To operate, simply right-click on any webpage and click on the "Block this website" context-menu item. The website will be added to the block list.





Daily is the world's leading dev news curator, delivering relevant updates to your new tab. It gathers and ranks articles from tens of different sources to help you optimize your time and boost your knowledge.



Scraping assistant tool. Editing and maintaining CSS/XPath selectors across webpages. Available as a Chrome/Chromium and a Firefox extensions.





BlockBlockAdBlock is a user script for Chrome and Firefox that blocks the BlockAdblock script.
GrandBastard offers 200K checkmate puzzles for chess lovers who want to practice their endgame.




PubPeer enables scientists to search for their publications or their peers publications and provide feedback and/or start a conversation anonymously.
Shorten URL is a Firefox extension that shortens long URLs from the context menu or toolbar button, with your selected URL shortener. The result is displayed in location bar. Shorten URL supports more than 100 URL shorteners.




Blocks the ”seen” feature of the Facebook messenger, and your friends will no longer be able to see if you read their messages. Available for Chrome, Firefox and Opera.
Delete cookies from specified domains (black-list) or delete cookies not in the specified domains (white-list). This can be done on-demand or automatically at shutdown.



The Simon game is the game of lights and sounds in which player must repeat random sequences of lights by pressing the colored pads in the correct order.


To increase privacy in public spaces this extension blurs your messages as well as other content and only reveals one when you hover over it with your mouse cursor. Additionally, you can quickly toggle all effects by using a keyboard shortcut or by clicking the toggle button in...


Each time you'll visit a Wikipedia page or article, you'll be automatically redirected to its classic layout version (i.e. before the January 2023 interface changes). It does not require to have a Wikipedia account.

Kindle Cloud Reader lets you read ebooks instantly in your web browser - no Kindle device required.



