Mozilla Firefox Plugins, Add-ons and extension Page 39 of 74
Browse 1,830 Mozilla Firefox Plugins, Add-ons and extension on AlternativeTo including popular Mozilla Firefox options.
- Web Browser
- Free
- Open Source

Protect yourself and your organization from cybercrime by using Netcraft’s family of apps and extensions for your browser, phone, and email client.
Cost / License
- Free Personal
- Proprietary
Platforms
- Online
- Android
- iPhone
- iPad
- Microsoft Edge
- Google Chrome
- Kindle Fire
- Opera
- Mozilla Firefox


+4
Send to My-phone (QR Code Generator) is a restartless Chrome/Firefox/Opera extension to generate QR code of any open website. It is the easiest way to send a web-page from your desktop to cellphone browser.
Cost / License
- Free
- Proprietary
Application type
Platforms
- Mac
- Windows
- Linux
- Google Chrome
- Opera
- Firefox


Easily convert web pages to a PDF using this web-based online tool. You can use it as an online-service or as a Firefox add-on. Unfortunately you can only store whole web pages as a PDF-file, not only selected parts of a web page.
Cost / License
- Free
- Proprietary
Platforms
- Online
- Firefox


+1
3D printing doesn’t have to be a complicated, analog, SD card-filled experience; step into the future of modern 3D printing - using your phone, tablet or computer.
Cost / License
- Free
- Proprietary
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Chrome OS
- Android Tablet
- iPad
- Google Chrome
- Software as a Service (SaaS)
- Firefox


+12
Cost / License
- Free
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Google Chrome
- Firefox



The RegretsReporter browser extension, built by the nonprofit Mozilla, helps you take control of your YouTube recommendations.
Cost / License
- Free
- Open Source
Platforms
- Google Chrome
- YouTube
- Firefox



FREE browser extension. Blocks harmful sites, protects your privacy and finds deals while you shop.
Cost / License
- Free
- Proprietary
Platforms
- Google Chrome
- Mozilla Firefox


+1
Collect search engines or websites then use / switch them on one UI (any website that supports GET/POST request. Even works with those don't support GET/POST). User cutomizable, with special technical features.
Cost / License
- Free
- Open Source (AGPL-3.0)
Platforms
- Online
- Microsoft Edge
- Vivaldi
- Google Chrome
- Opera
- Brave
- Chromium
- Mozilla Firefox


+3
Advanced URL Catalog is a complete bookmark management solution that will allow you to create, edit, import / export, organize bookmarks, synchronize, remove duplicates and validate your favorite Internet pages.
Cost / License
- Paid
- Proprietary
Platforms
- Windows
- Internet Explorer
- Vivaldi Browser
- Google Chrome
- Opera
- Firefox
Web application that enables people to watch the same thing at the same time across the globe while interacting via video and text. Currently supports Netflix, Amazon, YouTube, Vimeo, Crunchyroll, etc.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Online
- Google Chrome
- Firefox


As you browse the internet, sites you visit can attempt to take screenshots of your computer as a pixel-by-pixel unique digital "fingerprint" of you & and your devices. This is called canvas fingerprinting.
Cost / License
- Free
- Proprietary
Platforms
- Mac
- Windows
- Linux
- Firefox


Zemanta is a tool that looks over your shoulder while you blog and gives you tips and advice, suggests related content and pictures and makes sure your posts get promoted as they deserve to be.
Cost / License
- Free
- Open Source
Platforms
- Mac
- Windows
- Linux
- Online
- Internet Explorer
- Safari
- Firefox
YouTube Center is a userscript designed to expand the functionality of YouTube. It includes the ability to download the video you're watching, auto selecting your preferred video quality and much more.
Cost / License
- Free
- Open Source
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux
- Maxthon
- Opera
- Firefox
Simple and discreet extension that enhances GitHub's search, letting you search for repositories and people faster than ever.
Cost / License
- Free
- Open Source
Platforms
- Online
- Google Chrome
- Safari
- Firefox


+1
VideoSkip allows you to filter out several types of objectionable content from video streams. It uses the same categories as the "Parents Guide" section of IMDB.com. It can skip sections entirely, or simply mute the sound or blank the video.
Cost / License
- Free
- Open Source
Platforms
- Online
- Google Chrome
- Firefox
SayAI WebExtension extends the ChatGPT browser interface by adding speech-to-text (ask questions using your own voice) and text-to-speech (ChatGPT speaks the answer aloud) functionality.
Cost / License
- Free
- Proprietary
Platforms
- Microsoft Edge
- Google Chrome
- Mozilla Firefox


+1
Bandwidth Hero - an open-source browser extension which reduces the amount of data consumed when you browse web pages by compressing all images on the page. It uses data compression service to convert images to low-resolution WebP or JPEG images.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Self-Hosted
- Google Chrome
- Firefox



Let’s face it. You have way too many tabs open, and it takes you AGES to find the right one when you need it most. You also spend too much time doing the same actions in your browser, and you struggle trying to find or memorize difficult shortcuts to become more efficient.



An extension that adds a myriad of much needed features and functionality to reddit for moderators.
Cost / License
- Free
- Open Source (Apache-2.0)
Application type
Platforms
- Online
- Microsoft Edge
- Google Chrome
- Firefox



Media Player is an open-source project that aims to enhance the overall YouTube experience.
Cost / License
- Free
- Open Source
Alerts
- Discontinued
Platforms
- Online
- Google Chrome
- Opera
- Firefox

Easy Youtube Video Downloader Express, successor of Easy YouTube Video Downloader , is a fast and easy way to download Youtube videos.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Mac
- Windows
- Linux
- Google Chrome
- Safari
- Opera
- Firefox
















































































