Cost / License
- Free
- Open Source (AGPL-3.0)
Platforms
- Online
- Google Chrome
- Firefox

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

With Advanced YouTube to MP3 converter you can easily convert and download any YouTube video to mp3 or mp4.
? No software needed to be installed ? Very fast thanks to the fast cloud behind it ? 100% Free to use ? Compatible with Adblock plugins.




Stratiform is the ultimate user friendly customization add-on for Firefox. It puts the power in the average user's hands to customize the browser's look.



OctoLinker is a browser extension for Chrome, Firefox and Opera which allows you to navigate through code on GitHub more efficiently.


Capture breathtaking views from Google Street View with ease. Frame your desired location in Street View, and with a click of a button, preserve stunning snapshots of real-world landscapes. Relive your favourite travel memories or plan your next adventure from the comfort of...



Does everything for HTML tables: Copy (table/row/column/cell), Sort (multi-column), Search (regex, range operations ...), Filter, Chart (bubble, line, pie, histogram ...), Statistics, Rearrange (column/row), Combine & Compare. Replaces TableTools.


Bookmark Duplicate Cleaner is a Firefox extension that allows you to easily find and remove bookmarks that occur in several places, it scans for bookmark duplicates and allows you to delete them.
This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Yodiz is the leading Agile Scrum tool and issue tracker. With it's innovative UI, simple UX and great set of features, it's probably the best tool.





A cross-platform files and text sharing app based on Apple’s CloudKit. The fastest way to open link from your computer in your iPhone.







TwitDloader is a browser extension that lets users download high-quality Twitter/X videos with a single click. It supports multiple resolutions, an intuitive interface, and more.




SiteLauncher is a lightweight Chrome and Firefox add-on that gives you a super-fast way to navigate between your favorite websites.

Link Gopher is a simple extension to extract links from Mozilla Firefox. It extracts all links from web page (including embedded links), sorts them, removes duplicates, and displays them in a new tab for copy and paste into other systems.
Security Plus is a browser extension powered by VirusTotal's API, which provides free checking of URLs for viruses. It uses up to 64 different antivirus products/scan engines to check for viruses that the user's own antivirus solution may have missed.


Make view image button great again!
This web extension adds "View Image" button to Google Image Search results again.


BeeIMG is a simple, fast, easy image sharing solution created to fill up your image sharing needs.
This add-on for Firefox provides a few options to make the sidebar more accessible and customize it.



A recent study by Khabsa & Giles (2014)* estimated that 24% of scientific papers are freely available through Google Scholar. In some scientific disciplines, it reached as high as 50%. Thus, Google Scholar can be a first stop to check for a free full text of a paper.

Context Highlight is a Firefox extension that allows you to highlight all instances (within a webpage) of a word, several words, or a phrase that you currently have selected. Right click anywhere on the page and choose "Clear Highlighting" to reset the page.


Survol is an open-source browser extension letting you preview any link you hover. It uses either API data or meta-data when there is no API.

GOSH.app is a free AI Powered Price Tracking Tool and Price Tracking Chrome Extension. Track product prices and stock levels at any store, anywhere using the magic of AI. Get instant alerts when prices drop, or the product comes back into stock.

