Top Extensions and Apps for Open Source

Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, YouTube and all other websites.
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
Adds React debugging tools to the Chrome Developer Tools. Created from revision 3cde211b0c on 10/20/2025.
Windscribe helps you mask your physical location, circumvent censorship, and block ads and trackers on websites you use every day
Fast, private, and ad-free browsing you can trust!
Skip sponsorships, subscription begging and more on YouTube videos. Report sponsors on videos you watch to save others' time.
Feature packed extension for Canvas.
Automatically learns to block hidden trackers. Made by leading digital rights nonprofit EFF to stop companies from spying on you.
Web media sniffing tool
This extension provides integration with GNOME Shell and the corresponding extensions repository https://extensions.gnome.org
VLC for Android is the best open source video and music player, fast and easy!
Private by default. Less tracking. Peace of mind built in.
Spider cover fire game - Be a spider rope hero fighting as a Miami man superhero
Open Source Camera app.
VPN for Privacy & Security. Fast VPN Proxy, Private Internet Connection
Applock - Fingerprint Lock with private browser, custom themes, and junk removal
MultiCraft — world of unlimited possibilities. Adventures are waiting for You!
Kodi media center, a free and open source cross-platform entertainment hub
Sky Map turns your phone into a window on the night sky.
Action game mafia style in an open-world. Join gangs and combat along
Support Flash content in Microsoft Edge
Finally, an efficient blocker. Easy on CPU and memory.
Change the web at will with userscripts
Universal speed control for video and audio.
The world's most trusted crypto wallet
用小组件自定义你的新标签页,支持暗黑模式
Everything can be scripted, allowing your browser to do more!
Web media sniffing tool
楽天市場、Amazon、Yahoo!ショッピングの商品を一括で検索できます。商品ページで価格が安いショップの情報をお知らせします。
Fast, private, and ad-free browsing you can trust!
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.
English United States (en-US) Dictionary based on GitHub: marcoagpinto/aoo-mozilla-en-dict.
A fork of Mark Tyndall's add-on, based on David Bartlett's British Dictionary R1.19 for Firefox, Thunderbird and SeaMonkey.
Userscript support for browsers, open source.
Firefox Language Pack for Afrikaans (af)
Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.
Changes the color of Firefox theme to match the website’s appearance.
Putting Flash back on the web. Designed to be easy to use, this extension will seamlessly enable you to play flash content, with no extra configuration required!
Global cache cleanup and site data (cookies/storage) with time periods and notifications. Great for developers. F9 shortcut included!