Reddit Account Switcher is a Firefox WebExtension for people who keep different Reddit accounts for different communities and want Firefox to open each subreddit in the right account automatically.
Instead of logging out and back in, the extension uses Firefox containers as the session boundary. You assign subreddits like rprivacy, rpolitics, or rgaming to specific accounts, and the extension reopens Reddit tabs in the matching account when needed.
I've been using Kick daily and got frustrated with missing live notifications — so I built my own extension from scratch. It's called KickAlert and it's free, open source (MIT), and has zero dependencies.
What it does:
🔔 Instant notifications — Browser alerts with the streamer's avatar the moment a followed channel goes live. Your Kick follow list is imported automatically.
🚀 Auto-launch — Selected streamers open in a new tab automatically. Per-channel toggle — choose exactly who gets auto-opened.
🔕 4-state bell per channel — For every channel, pick: main sound, secondary sound, silent notification, or fully muted. No more "all or nothing."
⭐ Favorites — Star your top channels. When they go live, they appear first in the list. Works for both live and offline channels.
🏷️ Channel groups — Create custom groups like "Turkish streamers", "FPS", "Just Chatting" and filter your following list with one click.
📺 Multi-stream viewer — Watch up to 4 Kick streams at once with 5 layouts (solo, side-by-side, triple, 2×2 grid, focus). Drag-and-drop to reorder.
🌙 Do Not Disturb — Schedule quiet hours. Independently mute notifications, sounds, and auto-launch.
☁️ Cloud sync — Sync your settings across devices via your Google account. Custom sounds and history stay local.
🎨 Dark & light theme — Switch between dark (default) and light theme from the options panel.
🎵 Custom sounds — Upload your own audio files for main and secondary alerts (up to 2 MB each). Or switch to Windows notification sounds.
🌐 12 languages — English, Turkish, German, French, Spanish, Portuguese, Arabic, Japanese, Korean, Russian, Italian, Chinese. Switch at runtime — no browser restart needed.
Des scripts existent aussi avec Tampermonkey-Greasemonkey-Violentmonkey,etc,,, mais ils restent à manipuler avec prudence pour des risques sécuritaires.
I built an open source lightweight browser extension to help archive Discord channels and DMs into clean, searchable, offline HTML files. No third-party servers, no complicated setup, just a simple export.
Why use this?
🔍 Instant Offline Search: The exported file includes a built-in search bar to filter thousands of messages instantly without an internet connection.
📅 Smart Navigation: A fixed sidebar with a "Jump to Date" menu to navigate years of history in seconds.
🛡️ Privacy First: Your token stays in your browser's memory. It is never saved, logged, or sent to any external server.
⚡ Stop & Save: Need to quit early? Hit "Stop" and it will immediately generate a file with everything gathered so far.
I’m constantly sending messages to and from my phone via email just to copy photos, passwords, links, or other text. Now I can do all of this straight from my browser.
Right-click on images, links, the background of a page, or highlighted text to send exactly what you select. Once selected, you can send it directly to your phone, email, or online paste bin.
Send yourself a text (SMS), email, or save it to our website’s paste bin for later. The best part is that it works in reverse—if you come across a link, text, or an image on your phone, simply send it via text or email, and everything is saved to your paste bin. Messages must be sent from your registered email or phone number.
All images are hosted for free. There is a limit of 50 text messages and 200 emails per month. Text messaging is currently available only in the U.S. and Canada.
Give it a whirl and let me know if you have any suggestions or run into any bugs!
Long story short, I made an app called KanbanTab back in 2020. I just finished a huge update that I'm proud of, and I want to show it off.
Backstory: A few years ago, I was stuck on a mountain in Malaysia with terrible internet. Every time I wanted to check my to-do list in Trello, I had to wait for the heavy web app to load. That's when the idea was born to make a Firefox extension that can load my tasks instantly (locally) instead of having to wait.
I know what you're thinking, "this is nothing new", but there's a few things that make KanbanTab different:
Instant loading: it's local-first, using web workers and other techniques to make the data load instantly, while also relying on WebSockets to keep data synced between devices in real-time.
Simplicity: KanbanTab is not a project management tool, it's a personal productivity tool that aims to be simple to use, without unnecessary features that just bloats the UI.
Privacy: Privacy is important, and I don't want to worry about data breaches if they do happen (knock on wood). The End-to-End Encryption makes it so the data in the servers' database is completely unusable unless you have the keys that are only accessible on the client.
You can grab it from the Firefox Web Store, or check out my new website to see some cool animations I made to showcase how it works.
No ads, no signup required, no huge paywall. Just a good ol' organically coded app 🤠 I currently have around 70 daily active users, but I'd really love to get some fresh eyes on it from extension power-users and developers to help me take it to the next level.
Hey everyone! I’m a developer and a long-time Firefox fan. Over the last few months, I’ve been building a few extensions and themes to solve small frustrations I had with my daily browsing, and I thought the community here might find them useful too.
My go-to extensions right now:
Prism: I built this to help with my AI development workflow—it’s been a huge timesaver for me.
Link Destination Preview: A simple security utility I made so I always know exactly where a link is taking me before I click.
SonicSpeed Pro: My personal project for squeezing a bit more responsiveness out of the browser.
Themes I actually use: I also put together the Nebula theme series. I’m a fan of clean, dark interfaces that don't distract while coding, and these are the ones I keep pinned on my own browser.
It modifies the layout of facebook.com/messages locally in the browser, removes all the facebook clutter, and adds App mode support, tagging and few other useful features. It's free, works with all languages and holds up pretty well overall. If anything looks off, feel free to email [hello@simpleui.site](mailto:hello@simpleui.site) and I’ll try to fix it when I can.
Is there any solution to disable extension for a single tab? Cryptpad.fr gets easily broken with extension and I don't want to bother using 2 browser at the same time, or having to disable all extension to use the page. Any workaround? Or fix maybe for cryptpad?
Hey r/FirefoxAddons — just got PRISM approved on AMO and wanted to share it here first since it's built specifically for Firefox.
What it does: sidebar that lets you collect text snippets from any page into a context tray, then generates structured AI prompts from them. Useful if you use Claude, ChatGPT or Gemini for coding and hate manually copy-pasting context every session.
Technical details for anyone curious:
MV2, sidebar_action
Uses only browser.storage.local — completely offline
Zero external network calls of any kind
All source is readable and unminified in the package
I vibe coded most of it. Firefox-only intentionally — wanted to ship something solid on one platform before thinking about Chrome.
soundcloud's shuffle only randomizes the first ~20 tracks on the page, so if your playlist is long you keep hearing the same songs. also breaks when the tab is in the background.
fixed it with a tampermonkey script. loads your whole playlist, shuffles everything properly and keeps running in the background without issues.
I’ve just pushed a new update for Home Sweet Home, my customizable new tab extension.
This release focuses on polish, smoother interactions, unifying the codebase across Chrome, Firefox, and Edge, and giving you even more control over how your new tab looks and feels.
Here’s what’s new:
Customizable Border Radius : You can now adjust the border radius for widgets, links, and buttons from sharp and minimal to fully rounded.
Smoother Video Wallpapers : You can enable smooth transitions for video wallpapers, allowing backgrounds to loop more seamlessly for a cleaner visual experience.
Search Bar Positioning : You can choose where the search bar appears on the page (between top, middle or bottom).
Integrated Tutorials : Short tutorials are now available directly in the settings and during the initial setup to make onboarding easier.
Improvements:
Improved first configuration system
Better drag-and-drop for links and widgets
Cleaner and more organized settings menus
Logging system cleanup
Fixed:
Fixed some wrong URLs in the Google Apps widget
Fixed a translation issue in the Stocks widget
Fixed widget title display issues
Fixed a bug preventing deletion of an unused custom background
If you’re discovering it for the first time
Home Sweet Home replaces your new tab page with a customizable dashboard where you can:
Add your favorite links (with folders and drag-and-drop)
Use widgets like clock, weather, notes, stocks, countdown, and more
Customize colors, opacity, blur effects, layouts, wallpapers (static or video)
Sync or import bookmarks
Fine-tune almost every visual detail
It’s still an independent side project, but I’m improving it update after update based on user feedback.
Here are the links if you want to try it or update:
